Bossless Boss Bloon Event icon; if a Boss is available, it uses that Boss's icon instead
Rules for Boss Bloon Event, including the text for Bloonarius
Boss Bloon Events are events in Bloons TD 6 where the player fights off a Boss Bloon while also facing rounds of other bloons. The main Boss Bloon Event can be accessed via the Boss Bloon Event button in the main menu. Boss Bloon Events were first introduced in Version 27.0, starting with Bloonarius 'the Inflator'. Further Boss Bloons were added in later updates:
- 'Gravelord' Lych in Version 28.0.
- Vortex: 'Deadly Master of Air' in Version 31.0.
- Dreadbloon: 'Armored Behemoth' in Version 34.0.
- 'Reality Warper' Phayze in Version 38.0.
- Blastapopoulos: 'Demon of the Core' in Version 45.0.
As Bosses were added to the game, each new boss was tacked on to the end of the rotation.
Playing against Boss Bloons in multiplayer via Co-Op Mode has been added in Version 28.0. This option is available whenever a Boss Bloon Event is active. In addition, Ranked Bosses have also been added in Version 28.0, with similar gameplay to Race Events, except defeating the boss at all stages as fast as possible. A special variant of the Boss Bloon Event gamemode appears as the ruleset "Boss", exclusive to Contested Territory. This ruleset currently did not include Dreadbloon or Phayze until update 39.0. Alternatively, Boss Challenge offers a similar full-on experience with any available Boss Bloon with only standard gameplay available.
Starting with 33.0, game saves for Boss Events are locked to a single device. In addition, to encourage specific choices of Paragons, Paragons are now limited to 4 (3 prior to Version 33.3) per Boss Event, though this limit can change.
Battles[]
The main structure of Boss Bloon Events consists of defeating all 5 Tiers of the Boss in order to fully win. Beating all 140 Rounds is not required, only up to the fifth and final boss tier, with the minimum possible round being Round 120. Two variants of the boss exist, Normal and Elite. Elite is a harder version of Normal with significantly greater HP and much stronger Boss abilities, but nets greater rewards upon beating each tier. In order to challenge the Elite Boss, the normal boss must be beaten first.
When a boss is on screen, rounds will always be sent as if "Auto Start" was on, sending the next round as soon as the previous one finishes. Loading back into a game save will load the last completed round, but if the boss is active then the game will auto-continue regardless if "Auto Start" is on/off. Once the boss is no longer on screen, any bloons left over in the current round must be popped for the normal round conditions to continue upon subsequent rounds.
Once the boss arrives, the appropriate boss music will play, and the Health HUD for the Boss Bloon will be visible at the top of the screen. Rounds will still be sent normally, regardless of the Boss's status. Rounds where the boss appears will be modified. Once dead, the boss undergoes a defeat animation and the boss music stops. The game then continues as normal, returning back to ordinary Auto Start settings. If the boss dies on its Tier 5 stage, the game is over and the player receives a win screen after beating the current round.
Players can lose to the boss in three different ways: losing all lives to non-boss bloons of any type (including natural bloons and boss minions such as Bloonarius Minions or Dreadrock Bloons), leaking the boss with any amount of health, or failing to kill the boss within 20 rounds of its appearance no matter its tier or path progression.
While standard Continues remain (without extra cash), the player is also given the option of choosing a checkpoint. Using a checkpoint will restart the player back to the earliest checkpoint in groups of 20 rounds, starting from Round 20. Checkpoints cost more 
100 every 20 rounds, starting from Round 20 (e.g. losing on Round 40 will cost 200, and losing on Round 60 costs 300), up to 600 at Rounds 120+. This option is only presented to players in Co-Op Mode if they directly lose to a boss, which means players cannot directly restart to a checkpoint after beating a boss tier. However, even in co-op, players can agree to leak lives to be presented with the option of a continue.
Of course, the player can also press Restart to revert back to the first round for zero cost. If the player loses while the boss is not on-screen (including rounds 1-39 and any grace periods before next boss tier spawns), the continue option will still be presented, although checkpoints remain an option. (prior to Version 40: Losing to a Boss by not killing it within 20 rounds causes Continues to be disabled and completely prevents the player from going back to the last checkpoint.)
Bosses each have a separate soundtrack, most of which are unique to a certain theme of boss.
- "Primal One" plays during Bloonarius, Vortex and Dreadbloon's Boss Events.
- "Onslaught" plays during Lych and Blastapopoulos's Boss Event.
- "The Reality Warper", an edited version of Onslaught, plays during Phayze's Boss Event.
Rewards[]
Rewards for one-off rewards may possibly change from week to week. Refer to #Events for a list of one-off rewards. Rewards for the Ranked Boss are detailed here.
(Trophy rewards are formatted as <normal reward> / <elite reward>)
Main Leaderboard[]
Note that there is a special medal for placing in any of the categories in this section and Elite has its own separate special medals as well.
- 1st Place: Black Diamond Badge,
1000, 40 / 60, 1 Power, 1 Tier 5 Insta-Monkey - 2nd Place: Red Diamond Badge, 750, 35 / 50, 1 Power, 1 Tier 4 Insta-Monkey
- 3rd Place: Blue Diamond Badge, 500, 30 / 40, 1 Power, 1 Tier 4 Insta-Monkey
- Top 50: Gold Diamond Badge, 450, 25 / 30, 1 Power, 1 Tier 3 Insta-Monkey
- Top 100: Double Gold Badge, 400, 20 / 25, 1 Tier 3 Insta-Monkey
- Top 10%: Gold Silver Badge, 300, 10 / 15, 1 Tier 2 Insta-Monkey
- Top 25%: Double Silver Badge, 200, 6 / 10, 1 Tier 1 Insta-Monkey
- Top 50%: Silver Badge, 100, 3 / 5, 1 Tier 1 Insta-Monkey
- Top 75%: Bronze Badge, 50, 2 / 3, 1 Base (Tier 0) Insta-Monkey
- Below top 75%: No reward
Mini Boss Leaderboard[]
Mini Boss rewards do not have special medals, just like the Mini Race.
- 1st Place: 500, 15 / 20, 1 Tier 4 Insta-Monkey
- 2nd Place: 400, 10 / 15, 1 Tier 3 Insta-Monkey
- 3rd Place: 300, 5 / 10, 1 Tier 3 Insta-Monkey
- Top 10%: 250, 3 / 5, 1 Tier 3 Insta-Monkey
- Top 25%: 150, 2 / 3, 1 Tier 2 Insta-Monkey
- Top 50%: 100, 1 / 2, 1 Tier 1 Insta-Monkey
- Top 75%: 50, 1 / 1, 1 Tier 1 Insta-Monkey
- Below top 75%: No reward
Events[]
To find a list of every Boss event and their custom rounds, view this article.
Assume each event starts at Saturday 8:00 pm NZST and ends at Thursday 3:00 pm NZST unless stated otherwise. From Week 14, the end date was Thursday 4:30 pm NZST to accommodate the added competitive leaderboards, but from Week 40, the end date was set at Thursday 3 pm NZST, or Thursday 2 pm NZST for entry to a Ranked Boss game save. Boss Bloon Events in the original Bloons TD 6 are not the same as those in Bloons TD 6 Console, which have their own separate Boss Bloon Events.
Also note that all Boss Bloon Events contain "Custom Rounds"; these are normally custom rounds that are accompanied with each type of Boss Bloon. Boss Bloon Events tagged with an asterisk contain additional custom rounds. If not specified otherwise, the maximum number of Paragons available is 4.
The latest 3 Boss Events are shown below.
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Boss Bloon Cycle[]
The current Boss Bloon rotation is as follows: Bloonarius → Lych → Vortex → Dreadbloon → Phayze → Blastapopulos → repeat to Bloonarius.
Each newly released Boss typically appears 4 consecutive times before the expected regular boss cycle resumes (with Phayze being the exception due to a bug on release). In addition, the map the Boss is fought on will change each week.
Co-Op Bosses[]
Co-op bosses behave similarly to regular bosses. There are multiple ways to play a Boss Event on co-op, either via the main Boss Event screen or through the "Play Social" button on the home screen. In co-op bosses, the process for obtaining higher-tier Paragons and optimal farming generally become far easier. This is balanced out by increasing boss HP depending on how many players are in the game. 2-player fights will have 20% more boss HP, 3-player fights will have 40% more, and 4-player fights will have 60% more. Co-op does NOT increase the speed of the boss. In addition, Co-op does not present the option to restart at a checkpoint if they do not lose lives intentionally.
Completing a co-op boss grants the same rewards as solo play, and playing the same event solo after already beating it in co-op will not grant the rewards twice. Completing a co-op event in Ranked mode will also place the player in a completely separate leaderboard depending on the number of players in the game, detailed below.
Ranked Bosses[]
Boss Race Rewards for the main race
Boss Race Rewards for mini-race
In Ranked Bosses, players compete in a global leaderboard for the fastest time, least tiers, or least cash spent in the event. Everything about the event remains the same, except with Powers and Premiums (specifically Double Cash and Hero Booster) being disabled (most likely to avoid unfair use of Powers such as Tier 5 Insta-Monkeys or Cash Drops, as well as avoid pay-to-win conditions). For fastest time events, the time used for the leaderboard is the time that the boss is on-screen. For least tiers and least cash events, the tiers used and cash spent are calculated similarly to how they are in challenges.
Furthermore, a penalty timer is introduced which adds to a player's time in fastest time leaderboards and serves as a tie-breaker in Least Tiers and Least Cash leaderboards. While the Boss is not on screen, the penalty timer will start ticking 10 + round number * 0.25 seconds after the final Bloon in a round is sent and stops once the next round begins. During the penalty timer, all purely cash generation abilities stop cooling off until the penalty timer stops. If the player beats the round before this time limit, the timer does not begin.
The moment the final tier of the Boss is defeated, both timers stop counting and your final time, tiers, or cash is recorded. For timed events, the penalty is added to your boss timer. Co-op ranked leaderboards behave in the same way, where there is a different leaderboard for the number of participants in the co-op game. Large rewards are given to players who place well on the leaderboard.
Players are also entered into a "Mini Boss" leaderboard which is nearly identical to the Mini Race leaderboard. The player is automatically entered into a smaller leaderboard with only a max of 100 players. It has its own, smaller reward in addition to the main one.
Players can toggle on or off Ranked mode for Bosses in the bottom left of the main Boss Event screen. All players in a Co-Op match must have this option turned on in order to participate a Co-Op leaderboard, but it is possible for some players to quit partway through.
Strategy[]
- See also: Boss Bloon/Strategies/BTD6
Summary[]
Farm super hard in order to save income for handling the boss. Always farm early as possible using the most optimal farming methods, particularly Benjamin, Geraldo, Banana Farms, or Merchantmen. Each boss may have different properties depending on type, but most anti-BAD strategies should be powerful against Boss Bloons. Keep an eye on any special properties of the boss, as this may alter the way that boss needs to be beaten.
Tips[]
- Depending on the type of Boss Bloon, use different strategies for defeating them. Look at their underlying weaknesses. Strategies that work for BADs, with exception of instakills or health reducers, will likely work for Boss Bloons too.
- Bloonarius is weak against high damage, and the tier 1 and 2 bloons spawned from it are weak against anti-ceramic defense like M.O.A.R. Glaives and Blade Maelstrom. With Geraldo, one can opt for multiple Blade Traps to avoid having to prep defense.
- Lych only spawns MOAB-Class Bloons, so most defense that is great against Lych itself is also great for the Lych-Soul and resurrected blimps. If not confident, one can opt for a MOAB Shove for tier 1 and 2 Chained MOABs. Another alternative is intentionally stalling rounds to avoid more MOABs from spawning, and then being resurrected.
- Vortex can be constantly pushed back to its spawn if enough damage can be dealt from a distance. Elite Defender, MOAB Eliminator, and Ray of Doom are fantastic options to do this in tier 1 elite for the first two, and up to tier 2 for the latter (with buffs).
- The bulk of Dreadbloon's health comes from it's ceramic rock exterior. Thus, defense with ceramic bonuses such as Deadly Precision and Artillery Battery are more viable than typical of a boss. Towers where the bulk of their damage can ignore the Rock Bloons such as M.A.D are also great for staying focused on the boss. Another alternative is simply doing so much damage that rock bloons never get a chance to mess up targeting, with all towers set to First.
- Phayze's innate, regenerating camo property can easily be bypassed by towers with innate camo detection. Towers that deal extra damage to Camo Bloons are especially effective at combatting it, particularly the Camo specialist Ascended Shadow. Its constant dashing around the track can also be countered (slightly) through use of one or more Support Chinooks.
- Blastapopoulos
- Using Benjamin or Geraldo to kickstart income flow makes them generally the best heroes for Boss Bloon Events.
- Damage bonuses like Glue Strike, Embrittlement, and Cripple Moab, combined with fast, high projectile towers like Overdrive and Sun Avatars, can deal massive damage. Their combined damage output can rival paragons in the lategame.
- If not confident, the best Powers to start with is a Cash Drop at the start. This is because it provides a kickstart in massive greed that goes a long way, since you can start out with a Greater Production Banana Farm with the extra cash. If even less confident, one can use a high tier Banana Farm Insta-Monkey or multiple cash drops. To assist this, use of Banana Farmer for income assistance is beneficial, and Tech Bot for automatic assistance with ability activations is worthwhile. Purely offense-based Powers such as Super Monkey Storm or Road Spikes will contribute very little, so it is better to avoid them.
- Because bosses count for determining RBE on screen, and themselves pack with extremely high health, Avatar of Wrath is able to cap out its RBE damage bonus quickly. This makes Avatar of Wrath an excellent choice for earlier tier bosses of any type. That being said, its value does wear off in much higher boss tiers due to the 90,000 RBE cap for +30 damage.
- A Vengeful True Sun God is not required for Boss Bloons. Players can simply pick out a True Sun God and compensate its weaker power with many towers spammed on the map, or simply build two to four Paragons.
- This is especially helpful for players who do not have the Monkey Knowledge that would enable the VTSG, or if the necessary components for a VTSG are disabled.
- Most Bosses will always begin on the very first path of a certain map in the condition that the first available path formation is Round 1. Test the map on Sandbox Mode and test a MOAB send on Round 1; the path where the MOAB goes is likely where the Boss may spawn from.
- If desperate to use Powers, it is wise to invest in money-generating powers, especially Cash Drop on the first round possible.
- However, powers such as Monkey Boost and Energizing Totem can still help, as they can boost crucial towers DPS beyond boosts provided by Engineers, Monkey Village, and Alchemists. Buffs from powers cannot be sapped by Lych.
- Time Stop essentially acts as a second Monkey Boost except for your abilities. As of Version 27.0, Time Stops will also slow down BADs and Boss Bloons to the same reduced speed as Towers. Abilities and Paragons are also unaffected by the reduced speed which is one of the many reasons why Time Stop is a valuable Power to use here.
- As seen on December 8th 2021, Boss fights can end earlier than normal, that way an update release such as 29.0 will not result in players who start a boss event late having a potential competitive advantage (or a competitive disadvantage).
- Version 32.2 removed the Spike Storm 0-4-2 ability to benefit from start-of-round bonuses without ending the event early, thus putting players who updated at a disadvantage.
Paragon Tips[]
- Certain Paragons may contain unique strengths that should be taken advantage of to deal optimal damage to the Boss at certain stages of the game. Some may be very cheap and only require simple buildups, while others are more expensive. Not all Paragons fit in all scenarios, so choose the Paragons that matter for the current Boss. And finally, note that there is normally a limit of 4 Paragons for all Boss Events, making choosing the right ones a key part of Boss strategy.
- The Apex Plasma Master excels when bouncing against obstacles or the entrance, making it a very strong pick against Vortex. It struggles more against other bosses if it cannot bounce its projectiles off obstacles, since its DPS otherwise is not great. Therefore, it is recommended to place it with a lot of obstacles maps, such as Hedge, Cornfield (If the side corns aren't removed), Sulfur Springs or Encrypted.
- The Glaive Dominus is a better cheap option against Lych or Bloonarius when there are not many obstacles. In addition, its explosive glaive attack ignores Vortex's shield, making it used for elite tier 2 quick kills. It also is very consistent at dealing with all rock bloons from all Dreadbloon tiers. The unique global Primary buff giving +11% attack speed makes co-operative Glaive Dominus + Primary Paragons a stronger synergy.
- The Ascended Shadow is a very good single tower option to use, not only due to its high damage through its sticky bombs, but also its utility in the form of its global camo detection and permanent reduction of Bloon/MOAB speed and MOAB HP. Its bonus damage to Camo Bloons making it particularly effective against Phayze. With the global range of the Sticky Bomb, it is also excellent at dealing with Vortex from a far range.
- The Navarch of the Seas is a highly useful Paragon. Its hooks remove the threat of spawned/revived MOAB-class Bloons including BADs (through its ability) and it overall deals massive damage to Bosses. Another useful feature of the Navarch is its additional income buff that stacks with Trade Empire. It is recommended to place near bends or craved to maximum the damage with the 6 Turret guns. It also buffs the Goliath Doomship and Nautic Siege Core, although it does not buff their ability.
- The Master Builder can prep huge burst damage with its mega sentries. Detonating the mega sentries will be its largest source of damage and will also ignore Vortex's shields. It is recommended to continuously placing the new Mega Sentry Turrets next to the Boss bloons to get extra damage from the Paragon Sentries's explosion.
- The Goliath Doomship is a very powerful lategame paragon that matches its high price. The carpet bomb ability can wipe out millions of elite boss health at higher degrees, and thus preparing it one or two rounds before the boss spawns is recommended to get the ability ready for the boss round.
- The Magus Perfectus is best used as a powerful sustained DPS Paragon. It is effective against Bloonarius and Dreadbloon (if it's not immune to Magic). Compared to its high price, much of its true power come from micromanaging its fluctuating graveyard mana and timing its abilities carefully. It is also a recommended to place it where it can hit the boss most times for maximum damage while also setting on Strong (If the Boss Bloon is Dreadbloon, set the targeting to First instead) to get the most damage from Arcane Metamorphosis.
- The Nautic Siege Core is a devastating and mid DPS Paragon. Compared the price of Cheaper Ascend Shadow. It is recommended to place it next to nearby Paragons to grant them ability cooldown buffs. The Nautic Siege Core's Final Strike ability can deal extremely high damage to Bosses at higher degrees; caution is advised given this ability will temporarily disable the Paragon entirely.
Achievements[]
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What is this new bloonery? FIRST RELEASED: Version 27.0
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| Description: Defeat a Tier 1 Boss | ||
Rewards: 100 | ||
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Who's the boss? FIRST RELEASED: Version 27.0
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| Description: Defeat a Tier 5 Boss | ||
| Rewards: 100  x1 x1 | ||
 50
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Like A Boss FIRST RELEASED: Version 27.0
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| Description: Pop 50 Boss Bloons | ||
Rewards: x2  x3 | ||
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I'm the boss FIRST RELEASED: Version 27.0
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| Description: Defeat a Tier 5 Elite Boss | ||
| Rewards: 250  x1 x1 | ||
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Davids vs Goliath FIRST RELEASED: Version 29.0
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| Description: Win a boss battle without using a Hero | ||
| Rewards: 200  0-0-3 | ||
Version History[]
Balance Changes[]
Includes balance changes that involve all bosses, and also includes event changes. Balance changes in terms of player favorability.
- 27.0
- Released, with Bloonarius as the only boss
- 28.0
- Added Lych to the list of possible bosses.
- Added a direct Retry From Round X while the boss is active, so that the player does not need to intentionally self-defeat themselves to activate this button option.
- [Undocumented bug]There is no checkpoint continue if the player dies from 20 rounds passing.
- Added Boss ranked leaderboards
- Added Co-Op Boss Events as another available option on top of single-player
- Load Checkpoint option has now also been added to the Pause Menu during Boss Events
- Loading a boss save will now pause instead of automatically starting rounds
- [Note] This is the precursor to the 32.0 change disabling forced autostart on non-boss rounds.
- Boss event state is now saved immediately when Boss is defeated.
- Hero Selection for Boss Events is now not displayed as an option if no selected hero is allowed under the challenge rules
- Degree 1 paragons will now also deal double damage to Elite Bosses. Previously this bonus was not applying until at least Degree 2
- 31.0
- Added Vortex to the list of possible bosses.
- To prevent event games running past the final cutoff on score submission time for ranked events, there will now be a short (1 hour) break in the final moments of competitive events in which the event is still active but no further games can be started. Players in a Ranked Boss session can continue to play, but players who leave that session cannot resume it.
- [Note] Unranked Boss remains unchanged
- 32.0
- Round 20 checkpoint is now an available option. Costs 100 to restart from Round 20 checkpoint.
- Lych-Soul freeplay scaling bug fixed
- Changes to Boss auto-play behavior, if a Boss or its spawn are on screen the game & next round always starts immediately. If a Boss is not on screen then the game does not start automatically, play button is shown, & if you have auto-start toggled off then the game will stop between rounds.
- 33.0
- Loading a profile from the cloud will no longer keep boss event saves
- 34.0
- Added Dreadbloon to the list of possible bosses.
- Added Paragon Limit and Boss Health as possible modifiers that can be altered.
- [undocumented bug, possibly 34.2] Ranked timer penalty occasionally is active even while the natural rounds are still spawning in a Dreadbloon event, after defeating Dreadbloon itself, triggers if a round passes while rock bloons are still spawning. Can be fixed by exiting to home screen. .
- 35.0
- Added a Retry Last Round ‘continue’ option for Bosses for a MM cost with no bonus cash granted.
- 35.1
- [bug fix] Resolved an issue that could count Dreadbloon’s timer incorrectly after boss death
- 35.2
- Boss automatically fails the player 19 rounds after it spawned instead of 20 (r59 instead of r60, etc.)
- [note] This also fixes the restart from checkpoint bug putting the player in the next checkpoint with no boss.
- 37.0
- All Boss Bloons now instantly destroy projectiles upon spawning.
- Note: This is designed mostly as a counter to boss instakills via spike piles such as Permaspike.
- 38.0
- Added Phayze to the list of possible bosses.
- Added a Paragon Limit icon on event icons to depict limits to Paragons
- 39.0
- Boss Event default Penalty Time changed from: 10s → 10s + round number * 0.25
- While Penalty time is counting in Boss Events, cash generating abilities cooldowns will no longer run
- 45.0
- Added Blastapopoulos to the list of possible bosses.
Bug fixes and General Changes[]
- 28.2
- Fixed Version 28.0 bug that allows Lych to not resume rounds when re-loading a save.
- Fixed Version 28.0 bug that allows multiple heroes to be placed on screen.
- 28.3
- Resolved some issues causing a dead game state when opening the store in co-op boss events
- Resolved some lobby bugs related to entering Boss Lobby using a deep link
- Resolved an issue in boss co-op where crashing/closing program during a desynced round would then prevent you from properly rejoining
- 32.0
- Resolved an issue with Lych’s Soul having health and speed ramped up via freeplay scaling after round 80;
- 32.1
- Resolved an issue with Boss checkpoint costs being pulled down causing T5 boss checkpoint to be free
- 33.0
- Resolved an issue where powers could be disabled in unranked co-op Bosses
- Resolved a crash on using boss checkpoints
- 33.2
- Resolved a crash that could occur with low quality devices attempting to join boss lobbies as settings are being changed
- Resolved an issue that could occur when exiting out of Boss Menu as rewards are being distributed
- 35.0
- Boss Speed/Health modifiers now have icons.
- 35.2
- Resolved Issue with retrying during Boss fights
- Resolved Issue with checkpoints not spawning the next boss if Boss not defeated within a certain number of rounds
Bugs[]
- Current
- Patched
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This section is incomplete. You can help by expanding it. |
- [27.0?]If the player reloads a Boss Bloon Event game with the boss active and bloons exit just before the boss theme begins, no music will play. Patched unknown
- [34.0]Ranked timer penalty occasionally is active even while the natural rounds are still spawning in a Dreadbloon event, after defeating Dreadbloon itself. Occurs if a new round starts while rock bloons are spawning. Fixed in 35.1.
- [34.0]: Fighter Plane's anti-moab missiles will launch to hit Dreadbloon’s rock bloons but fail to hit them, causing the screen to be swarming with missiles. Fixed in 34.3.
- [34.0]: Dreadbloon spawns primary immune Rock Bloons when loading a freshly spawned boss save. Fixed in 35.0.
- [34.0]: The health of the Ceramic Shield was the same regardless of playercount. Fixed in 35.0, so that Dreadbloon Ceramic Shield now correctly scales with playercount,
- [34.0]: Dreadbloon moves at full speed after loading into a save with an active armored state. Fixed in 35.0.
- [34.0]: Reloading a Dreadbloon save would show ceramic armor visually when the boss is not actually armored. Fixed in 35.0.
- [34.0]: Trying to hook in a rock bloon with Monkey Pirates or Pirate Lord will crash the game. Does not affect Navarch of the Seas whatsoever. Fixed in 35.0.
- [32.0] There was a bug that causes Round 120 boss retries to cost no Monkey Money. Players that try to use it on Ranked Mode get automatically flagged with the hacker flag for cheating. Fixed in 32.1.
- [31.0] In the Version 31.x series, Lych's Lych-Soul could scale with freeplay ramping, causing it to be extremely quick and pack much more health. This was fixed in Version 32.0.
- [28.0] Dying from taking too long to kill the boss causes the restart last checkpoint option to not appear. Fixed in 34.0.
- [34.0]Using a checkpoint retry after dying from the rounds taking too long will cause the checkpoint to select the next interval of 20 without spawning the boss. This is common with Bloonarius and especially with Dreadbloon. Fixed in 35.2.
- [39.0] Penalty timers now penalize the player earlier. It is impossible to finish many rounds without getting a penalty. Fixed in 39.2.
- [46.0]: Vortex crashes at Tier 5 if the standard medal has not been obtained before, forcing the cancellation of Boss Bloon Events. Fixed in 46.3
Sounds[]
When opening the Boss menu:
- [Opening metal gates]
- [Metal gate locking at the top]
When starting a new Boss Event game:
- [Shutting metal gates]
Gallery[]
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Not enough images! There are not enough images on this page to sufficiently complete this page or section. You can help by uploading some images related to the article's subject(s). In particular, this article needs: More Dreadbloon and Phayze images, more Elite wins. |
.png "Bebossleaderboard ebloonarius (1).png (616 KB)")
.png "Bebossleaderboard ebloonarius (2).png (647 KB)")
.png "Get boss rewards race both (1).png (892 KB)")
.png "Get boss rewards race both (2).png (274 KB)")
Boss Descriptions[]
Boss Transition Animations[]
Boss Wins[]
Bloonarius Wins[]
Elite Bloonarius Wins[]
Lych Wins[]
Elite Lych Wins[]
Vortex Wins[]
Elite Vortex Wins[]
Dreadbloon Wins[]
Elite Dreadbloon Wins[]
Phayze Wins[]
Elite Phayze Wins[]
Boss Losses[]
Icons[]
Trivia[]
- Ninja Kiwi mentioned a conception of Boss Bloon Events back in their Version 15.0 patch notes for BTD6.
- In Version 27.1, there was a bug fix where players are now given the correct increased trophy win for beating Tier 5 Elite Bloonarius. However, players who had beaten Tier 5 Elite Bloonarius prior to the update had to contact Ninja Kiwi manually to receive the 20 lost trophies from earning 50 instead of 70.
- When Round 119 was made a fixed Freeplay round, it consisted of 2 (later 3) BADs. This is likely to build up to the Tier 5 Boss Bloons' appearance on 120.
- Lych was the first original boss from the BTD6 Generation, and is not based off an appearance from Bloons Monkey City. It was also the only boss in this category until Phayze was added in update 38.0.
- Nearly every time Vortex has appeared, it has been accompanied by increases in Bloon and MOAB speed.
- Phayze was the first Boss to not be run 4 times in a row on its debut after Bloonarius. Dreadbloon replaced its second week due to Ninja Kiwi "[working] out some bugs and fixes", presumably relating to Phayze.
- The first elite Lych and elite Phayze events were the only events to have over 5000 players, and thus are the only events to ever give out top 1% elite medals. This is because if there are less than 5000 players, it's impossible to get a top 1% without also getting a top 50 placement.
- All the current Boss Bloons first 4 debuts are Beginners, with at least 1 week is being an Intermediate map.
History[]
- On June 23rd 2021, Ninja Kiwi teased a new Boss Event on their Twitter, (that being Bloonarius). It was released on the 27.0 update alongside Paragons.
- On September 29th 2021, Ninja Kiwi teased a second boss on their Twitter. On October 1st 2021. Ninja Kiwi teased another image on Twitter, revealing it as Lych. It was released on the 28.0 update.
- On April 8th 2022, Ninja Kiwi teased the third boss (which is Vortex) on their Twitter. It was soon released on the 31.0 update.
- On November 29th 2022, Ninja Kiwi teased the fourth boss (which is Dreadbloon) on their Twitter. It was soon released on the 34.0 update. On June 19th 2023, Ninja Kiwi teased the fifth boss (which is Phayze) on their Twitter, showing a video of Phayze appearing in the last seconds. It was soon released on the 38.0 Update.[1]
- Week 4's Boss Bloon Event had started from 14th August 2021 at 8:00 pm NZST, and postponed from 15th August 2021 at ~3:50 pm NZST until 16th August 2021 at ~2:30 pm NZST. The event still ended on the same time, August 19th 8:00 NZST. This event became only available on version 27.3 due to a bug that caused boss retries to charge the player twice, and if done when the player can only afford one retry, would result in negative Monkey Money.
- Week 12's Boss Bloon Event has been stated on the October 8th 2021 blog to end early on a NZ Thursday. Specifically, it's 13 hours early, and would end on 8:00am NZDT (New Zealand Daylight Savings Time), which would translate to 7:00am NZST. At the time, New Zealand was in Daylight Savings. However, the starting time was 9:00 pm NZDT (or 8:00 pm NZST without Daylight Savings) on 9th October 2021. (Update 27.0)
- Between Week 9 and 11 (bottom-and-top inclusive), there was a bug where the hero in the rules menu would show "99" of a single hero, probably due to adding in a fixed hero between Weeks 6 and 8. (Update 27.0)
- The first week for Lych, Week 13, did not include Psi, likely because of bugs related to Psi causing the game to softlock during Lych battles. It is not known the exact bug in question. (Update 28.0)
- Since Week 16, Benjamin and Perma-Spike have become mutually exclusively available in Lych events. This ended in Week 24. (Update 28.0)
- In Week 22, only 2 Dart Monkeys were allowed, preventing usage of the Apex Plasma Master; this may have been done to promote usage of other Paragons, especially the relatively new Navarch of the Seas at the time. (Update 29.0)
- Week 36 had a new Boss Bloon fight midway into the week, replacing Encrypted with Monkey Meadow. Any possible rewards collected were not brought over to this new fight, meaning a player could've received double the amount of medals. (Update 30.2)
- Week 39's Vortex event banned Engineer due to a bug regarding 0-3-2 Cleansing Foam slowing down any bloon type including BADs. When tested with hacking, the foam can also slow Bosses. (Update 31.0)
- Week 40's Vortex event is only available on Version 31.1, yet the corresponding week's Odyssey was available on Version 31.0, and both Versions 31.0 and 31.1 were cross-compatible at the time. The corresponding week's Race Event was also unavailable on Version 31.0.
- Week 41's Vortex event had been datamined one day prior to its release. (Update 31.0)
- Week 44's Lych event had a bug in which the Lych-Soul is affected by freeplay ramping, causing it to have 240% increased HP and 195% increased speed at Elite Tier 5, making it almost impossible to defeat the Lych-Soul. This also occurred for Weeks 47, 50 and 53's Lych events. (Update 31.0, undocumented by Ninja Kiwi). It was soon patched in Update 32.
- Week 50's Lych event marked the first time when all Beginner Maps at the time (up to Scrapyard) had been used at least once in a Boss Event. Frozen Over was never used until then.
- Before the release of the first Dreadbloon event (Week 73), there are 3 maps which Bloonarius, Lych and Vortex appear a least once. Those are being Cubism, Adora's Temple and Lotus Island. Additionally, Cubism still have the title of every Boss in every map from Version 31.X to Version 44.X
- Week 55's Bloonarius Event was affected by a bug caused by the reworking of the continue system, which caused the Round 120 retry option to have no cost; however selecting it would immediately flag the player for cheating.
- Week 79's Vortex Event is the first use of an Expert Map, Dark Castle. (Update 34.0)
- Week 82's Lych Event is the first time where the starting round is at a later point, this being round 39 (Update 34.0)
- Week 87's Vortex Event had a new Boss Bloon fight midway into the week, removing the MOAB health modifier and replacing the Boss Health modifier with Boss Speed, alongside other minor changes, because of bugs making the boss lose large quantities of health. Any possible rewards collected could be re-earned, doubling the potential amount of earnable trophies from bosses for the week. (Update 35.2)
- The bug in question could be replicated on the replacement event.
- Week 106 boss is the newly released boss to the game - Phayze.
- Week 145's boss was supposed to be Phayze, but ended up being Bloonarius instead for unknown reasons.
- Week 146's Phayze appearance on Cubism marked the first map to have every Boss appear on it at least once following the debut of Phayze.
- Week 146's boss map was leaked from the Apple app store a week prior to Least Tiers Phayze on Cubism
- Week 174's boss rendered Four Circles the first map to have all six bosses (following Blastapopoulos's V45 release) appear on the map.
- Week 178's event was cancelled early due to a bug in Version 46.0 that would crash the game after popping Vortex at Tier 5 for players that have not yet obtained the standard medal before.
- Week 194a, a Boss Event that began when Version 48.0 released, was released close to April Fools and featured a slowed Lych on Blons. The event lasted 24 hours.
First Debuts[]
- Week 21 is the first week to use a repeated map with the same boss, that being Skates with Bloonarius (Week 10 repeat). The second occurrence is Week 28, with In the Loop (Week 6 repeat).
- Week 26 is the first week to use a repeated map with a different boss, on Cubism. Lych was featured on that week instead of Bloonarius, which debuted on that map during Week 5.
- Week 25's Boss Bloon Event featured an Advanced Map for the first time, Cornfield, with Bloonarius as the boss.
- Week 36's Lych Event is the first week to have an event replaced with a different one.
- Week 60 is the first boss event allow players to have Towers with Paragons upgrade available. Only Dart, Boomerang, Buccaneer, Ninja and Engineer were available.
- Week 70 is the first week to directly modify the health of a Boss Bloon. In this case, the Double HP MOABs submode was enabled, causing Bloonarius to also double in health.
- Week 77 is the first week to modify the speed of a Boss Bloon. In this case, Bloonarius had its speed tripled, although there was no icon for that modifier or boss health, so it did not show up in the in-game UI.
- Week 78 is the first boss event to modify the health of a boss without affecting MOABs. In this case, Lych had its health halved but speed doubled, although neither showed up in the in-game rules UI.
- Week 79’s Vortex Event was the first Boss Bloon Event to take place on an Expert Map, more specifically, Dark Castle.
- Week 82 is the first boss event to have a different starting round than round 1, starting at round 39 instead of round 1.
- Week 87 is the first boss event to have its data removed from the Ninja Kiwi's official user-friendly api after being replaced by a new event.
- Week 99's boss was supposed to be Vortex. However, Least Cash and Least Tiers Leaderboards were added in Update 37.0, ended up replaced with Bloonarius. However, said week was canceled due to players running into unexpected bugs.
- Week 103 is the first boss event that only allowed players to have 2 Max Paragons (the max Paragons for Boss events is usually capped at 4).
- Week 118 is the first boss event with a 7 Paragon limit, allowing players to get all Paragons released at the time: the Apex Plasma Master, Glaive Dominus, Navarch Of The Seas, Goliath Doomship, Magus Perfectus, Ascended Shadow and Master Builder at the same time.
- Week 119 is the first boss event on Impoppable difficulty.
- Week 121 is the first boss event with Half Cash active.
- Week 124 is the first boss event that bans all heroes and is also the first player made (created by Junior Monkey/Jessie Patch) boss event.
- Week 139's Dreadbloon on Logs had a movement speed of 500%, the highest at the time. Week 148's Vortex on Frozen Over with 400% speed had the highest speed of any boss at the time (given Vortex's base movement speed is far faster than Dreadbloon's).
- Week 131's map is the first, the fastest and the latest released map, as Sulfur Springs being released on Update 41.0.
- Week 152 was the third week with the most highest amount of HP ever appeared in the game, with Lych having with 144,000,000 HP on solo Elite Tier 5. The first two was Bloonarius on Skates (Week 70 with 80,000,000 HP from Double HP MOABs mode) and Bloonarius on Middle Of The Road (Week 126 with 120,000,000 HP).
- Week 164's map is the first Challenge Editor-exclusive map for a boss, being Protect the Yacht.
- Week 165 introduce the first time as only Paragon Towers are being restricted to both Normal and Elite. That is being Dart, Boomerang, Sub, Buccaneer, Ace, Wizard, Ninja and Engineer.
- Week 170 introduce the first time of Normal and Elite Boss Bloons have different types Ranked Leaderboards. Being Least Cash Leaderboards on Normal Blastapopoulos and Least Tiers Leaderboards on Elite Blastapopoulos.
- Week 173, Dreadbloon on Winter Park with 500% speed and 200% HP, was the first boss event with an 8 Paragon limit, allowing players to get all Paragons: the Apex Plasma Master, Glaive Dominus, Nautic Siege Core, Navarch of the Seas, Goliath Doomship, Magus Perfectus, Ascended Shadow and Master Builder; at the same time.
- Week 176's event was the first to use CHIMPS rules.
- Week 178 was supposed to be Vortex. However, due to a bug found in Elite Tier 5, where if the player doesn't have an Elite badge on their profile, their game will completely crashed, resulting starting from Round 1. This also affects all other bosses. Therefore, Ninja Kiwi canceled the week early, resulting from the 8th December 2024 to 13th December 2024 not having any Boss Events.
- Week 182 is the fourth week to set a precedent for the highest amount of HP ever of any Boss in the game, with Bloonarius having with 260,000,000 HP on solo Elite Tier 5. The first three was Bloonarius on Skates (Week 70 with 80,000,000 HP from Double HP MOABs mode), Bloonarius on Middle Of The Road (Week 126 with 120,000,000 HP), Lych on Winter Park (Week 152 with 144,000,000 HP). The event is also the first boss event that allows players to have all 9 Paragons, allowing players to get Apex Plasma Master, Glaive Dominus, Crucible of Steel and Flame, Nautic Siege Core, Navarch Of The Seas, Goliath Doomship, Magus Perfectus, Ascended Shadow and Master Builder all at the same time.
- The map from week 194a (2025 April Fool's Day) is the one with the shortest path in the game. The event is also the first boss event that allows players to have all 10 Paragons (via the paragon limit of 40), allowing players to get Apex Plasma Master, Glaive Dominus, Crucible of Steel and Flame, Nautic Siege Core, Navarch Of The Seas, Goliath Doomship, Magus Perfectus, Ascended Shadow, Mega Massive Munitions Factory and Master Builder all at the same time.
- Week 197's Dreadbloon had the highest Boss modifiers up to that point, with 1000% speed on Normal and 2000% speed on Elite.
Historical Statistics[]
- There are a variable number of instances of each map difficulty appearing for each boss (valid as of Week 198):
- Beginner Maps have appeared 127 times
- Intermediate Maps have appeared 48 times
- Advanced Maps have appeared 18 times
- Expert Maps have appeared 6 times
- Unique Maps Bosses have appeared on (valid as of Week 197):
- 24 Beginner Maps (Bosses have appeared on every Beginner map so far)
- 23 Intermediate Maps (All except Bazaar, Water Park and Covered Garden)
- 9 Advanced Maps (Cornfield, Off The Coast, Spillway, Sunken Columns, Underground, Geared, Ancient Portal, Another Brick and High Finance)
- 5 Expert Maps (Dark Castle, Ouch, Bloody Puddles, Muddy Puddles and Quad)
- 2 Challenge Editor-exclusive maps (Protect The Yacht and Blons)
- Boss Encounters (valid as of Week 198):
- Bloonarius has appeared 58 times
- Lych has appeared 48 times
- Vortex has appeared 37 times
- Dreadbloon has appeared 27 times
- Phayze has appeared 20 times
- Blastapopoulos has appeared 8 times
- Boss Events by Versions
- V27.x had 12 Bloonarius events.
- V28.x had 2 Bloonarius events and 6 Lych events.
- V29.x had 5 Bloonarius events and 4 Lych events.
- V30.x had 4 Bloonarius events and 5 Lych events (6 if counting a cancelled Lych event - this is what makes the api show 1 extra event).
- V31.x had 4 Bloonarius events, 4 Lych events, and 8 Vortex events.
- V32.x had 4 Bloonarius events, 3 Lych events, and 3 Vortex events.
- V33.x had 2 Bloonarius events, 3 Lych events, and 3 Vortex events.
- V34.x had 2 Bloonarius events, 2 Lych events, 1 Vortex event and 5 Dreadbloon events.
- V35.x had 1 Bloonarius event, 1 Lych event, 2 Vortex events (3 Vortex events if including a canceled Vortex event - does not show up in NK API) and 1 Dreadbloon event.
- V36.x had 2 Bloonarius events, 3 Lych events, 2 Vortex events and 2 Dreadbloon events.
- V37.x had 3 Bloonarius events, 1 Lych event, 2 Vortex events and 1 Dreadbloon event.
- V38.x had 2 Bloonarius events, 1 Lych event, 1 Vortex event, 2 Dreadbloon events and 5 Phayze events.
- V39.x had 1 Bloonarius event, 2 Lych events, 2 Vortex events, 2 Dreadbloon events and 1 Phayze event.
- V40.x had 2 Bloonarius events, 2 Lych events, 2 Vortex events, 1 Dreadbloon event and 2 Phayze events.
- V41.x had 2 Bloonarius events, 2 Lych events, 1 Vortex event, 2 Dreadbloon events and 2 Phayze events.
- V42.x had 1 Bloonarius event, 1 Lych event, 2 Vortex events, 1 Dreadbloon event and 1 Phayze event.
- V43.x had 2 Bloonarius events, 2 Lych events, 2 Vortex events, 1 Dreadbloon event and 2 Phayze events.
- V44.x had 2 Bloonarius event, 2 Lych Event, 2 Vortex Event (3 Vortex events if including a canceled Vortex event, - the NK blog mentions the main event) , 2 Dreadbloon events and 1 Phayze event.
- V45.x had 1 Bloonarius Event, 1 Lych Event, 1 Dreadbloon Event, 1 Phayze Event and 4 Blastapopoulos Events.
- V46.x had 1 Bloonarius Event, 1 Lych Event, 2 Vortex Events (0 Vortex event if including a canceled Vortex event, - the NK blog mentions the main event) 2 Dreadbloon Event, 1 Phayze Event and 1 Blastapopoulos Event.
- V47.x had 1 Bloonarius Event, 1 Lych Event, 1 Vortex Event, 1 Dreadbloon Event, 2 Phayze Events and 2 Blastapopoulos Events.
- V48.x has 1 Bloonarius Event, 2 Lych Events, 1 Vortex Event, 1 Dreadbloon Event and 1 Phayze Event as of Week 198.
Boss Debuts[]
- Week 1 introduced Bloonarius on Monkey Meadow with no restrictions.
- Week 13 introduced Lych on Carved with the only restriction being Psi (due to a bug that caused softlocks).
- Week 39 introduced Vortex on Cubism with the only restriction being no Engineer (due to a bug involving Cleansing Foam).
- Week 73 introduced Dreadbloon on Monkey Meadow with no restrictions.
- Week 106 introduced Phayze on Resort with no restrictions.
- Week 169 introduced Blastapopoulos on Four Circles with no restrictions.
Ninja Kiwi Blogs[]
- According to Ninja Kiwi's 5th November 2021 blog, Ninja Kiwi states that they do not list Boss Bloon event results on their blogs to minimize bulkiness of the blog.
- According to Ninja Kiwi's 29th April 2022 blog, Ninja Kiwi stated that an in-game option to create Boss Bloon Challenges is being considered but aren't on their priority list.
- According to Ninja Kiwi's 13th May 2022 blog, there are no plans at the moment for skins and applicable trophy store items for Boss Bloons.
- According to Ninja Kiwi's 23rd June 2022 blog, a boss event on an expert map, while possible, isn't likely since it would limit who could play it.
- As of 16th February 2023, there has been a boss on an expert map, although only once, with Vortex appearing on Dark Castle on Week 79, albeit with its speed reduced to 75%.
- As of 30th March 2024, a boss on an expert map has occurred again with Bloonarius on Ouch, albeit with its speed reduced to 70% (50% on Elite), and with the speed of Bloons and MOABs reduced to 80%.
- According to Ninja Kiwi's 29th July 2022 blog, Ninja Kiwi aren't planning on adding a boss rush mode, as it would be too hard to beat.
- However, in the patch notes of Version 39.0 Ninja Kiwi mentioned a Boss Rush mode could potentially be possible, although not in the immediate future.
- A Boss Rush mode was later implemented in Version 43.0.
- However, in the patch notes of Version 39.0 Ninja Kiwi mentioned a Boss Rush mode could potentially be possible, although not in the immediate future.
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