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Bloons Wiki

The Bureau grants special Bloon popping knowledge, allowing nearby Monkeys to pop all Bloon types.
~ In-game description

Monkey Intelligence Bureau (sometimes abbreviated as MIB for short) is the third upgrade of Path 2 for the Monkey Village in Bloons TD 6. It grants all the towers in its radius effectively the Normal (Normal Type (pops Black, White, Purple, Lead, Frozen), i.e. affects any bloon type) damage type. All towers within its radius can pop Lead Bloons, Thermal Bloons, Frozen Bloons, and Purple Bloons, on top of camo detection via its previous Radar Scanner upgrade. This includes bloons that contain any mix of these aforementioned bloon attributes.

Note that the Monkey Intelligence Bureau buff does not necessarily grant towers the ability to target or affect any bloon type including MOAB-class bloons, but it allows them to damage any bloon type. Most attacks with status effects exclusively dependent on a direct attack rather than dependent on affecting specific tiers of bloon (e.g. Counter-Espionage shurikens removing camo from Camo Leads is independent from tier of bloon, but Pin's pinning effect on a Lead or Ceramic is not) are also affected by MIB. In some very special cases, the Monkey Intelligence Bureau can help grant certain towers with the ability to allow specific attacks or status effects to affect and target specific bloon tiers, but only up to Rainbow.

It costs $6,375 on Easy, $7,500 on Medium, $8,100 on Hard and $9,000 on Impoppable.



Monkey Intelligence Bureau turns the entire Village into a high-tech pentagonal-shaped steel building. It retains its pair of rotating radar speakers on top of a radio tower stand. Across the building, it has three orange windows per side. The door and entrance appear to be made of concrete.

The upgrade icon for Monkey Intelligence Bureau is not the same as it does in BTD5. It now appears to slightly resemble the COBRA but with sunglasses. It is a monkey in a black three-piece businesswear wearing black sunglasses.


Just like in BTD5, the Monkey Intelligence Bureau upgrade allows nearby towers to damage any bloon property. More specifically, the Monkey Intelligence Bureau awards an equivalent of the normal damage type to all nearby towers, allowing them to deal damage to any type of bloon property. Most of the non-MOAB status effects can additionally affect any type of bloon up to Rainbow.

  • Black and Zebra Bloons can be popped by all forms of explosive damage.
  • White and Zebra Bloons can be frozen by freezing damage (i.e. from Ice Monkey, Ball Lightning with "Cold Front" MK, and Sentry Expert's Cold Sentry).
  • Frozen and Lead Bloons can be popped by sharp projectiles (e.g. darts, tacks, blades) without special upgrades.
  • Purple Bloons can be popped by attacks that involve energy, plasma, or fire.
  • Lead Bloons can be frozen and popped by freezing damage (i.e. from Ice Monkey without Cold Snap, Ball Lightning with "Cold Front" MK, and Sentry Expert's Cold Sentry).
  • DDTs can be popped by sharp projectiles (e.g. darts, tacks, blades), explosive damage (e.g. bombs, missiles), or freezing damage (e.g. Snowstorm ability, Icicle Impale) without special upgrades.

However, this will not grant power to attack or affect MOAB-class, such as BADs, if the tower cannot attack them, like BTD5. It also does not grant a small number of non MOAB-class status effects with the power to affect specific bloon immunities:

  • Pin effects will never halt progress of Leads or Ceramics
  • Super Monkey's Knockback always has a weaker effect on Leads and Ceramics
  • Downdraft blowback never blows back Frozen or Lead.
  • Ice Monkeys cannot re-freeze frozen bloons without the Re-Freeze upgrade. (Possibly a bug)
  • Buckshot always has a weaker knockback effect against Leads and Ceramics.

There is one exception to these rules, Psi. Psi normally cannot target Leads or Purples, but giving Psi with Monkey Intelligence Bureau allows them to target those bloon types. This doesn't allow Psi to target Ceramics, however, and requires Level 7+ to do so.

Monkey Intelligence Bureau does not revoke a tower from retaining the Sharpening Stone buff, as MIB simply adds popping of all bloon types (e.g. Lead-Popping Power Also affects Lead Bloons, Black-Popping Power Also affects Black Bloons) in a similar way to setting a damage type to Normal Normal Type (pops Black, White, Purple, Lead, Frozen). Strangely, since freezing towers still can't re-freeze a bloon without Re-Freeze or similar, not giving Frozen-Popping Power Also affects Frozen Bloons to all attacks that create a Freeze Freeze (standard bloons, unspecified alt variants) status effect, MIB technically doesn't actually give all types of popping power.

Targeting Priorities[]

Monkey Intelligence Bureau supports nearby towers with influential tower buffs. Because it also has Grow Blocker, it can attack any Regrow Bloon within its range. However, for simplicity reasons, Monkey Intelligence Bureau has no targeting priorities.



This upgrade is very expensive in concept, but it proves very effective at countering DDTs. Strong DPS towers whose weaknesses are only specific bloon types would strongly benefit from this upgrade. The majority of popular strategies often rely on MIB to reduce weaknesses against DDTs. Sometimes a MIB is used to allow energy-based Magic Monkeys to damage Purples, most specifically to survive the pre-blimp stage of Round 95. Another viable use is for allowing towers to damage Frozen Bloons in order to fix the negative synergy between sharp-based attacks and Ice Monkeys, specifically 0-1-2 Re-Freeze Ice Monkeys or Icicle Impale. On certain scenarios, an MIB is used to allow high-pierce explosives such as Bloon Impact to pop Blacks and Zebras versus high-density rounds.


  • The "better" crosspath depends on the situation, but 2-3-0 MIB is generally better overall, as it provides more coverage and provides Jungle Drums effects.
  • Do be sure to provide some discounts via Monkey Commerce before upgrading to this upgrade, to save a good chunk of money.
  • In CHIMPS, it is important to try discount an MIB village by Monkey Commerce, although it is quite expensive to do so. The cost for buying the two separate Villages is $12,365 (a 0-0-2 village and a discounted 0-3-0 village in range of each other) rather than $11,800 (just a 0-3-0 village). The difference is $565. If the player is planning to put other monkeys in range of the towers then this difference is negligible.
  • Monkey Intelligence Bureau is very effective at countering the weaknesses of attacking DDTs, especially good for high-attack powerful towers with Lead or Black weaknesses.
  • Despite how overpriced the MIB upgrade is, especially in BTD6, MIB will provide a drastic improvement for certain upgrades by eliminating a wide variety of attack weaknesses.


  • [~25.0] Possibly intentional, but fails to make sense when considering damage types, Ice Monkeys nearby MIB cannot refreeze bloons without the Re-Freeze upgrade. It can be seen as a bug due to the lack of logic when considering that Frozen Bloons are a property, as towers other than Ice Monkeys can pop Frozen when given MIB but the Cold Cold Type (pops Black, Purple) and Metal Freeze Metal Freeze Type (pops Black, Purple, Lead) damage types do not appear to fully embrace the Normal Normal Type (pops Black, White, Purple, Lead, Frozen) damage type.


Version History[]

No changes since Monkey Intelligence Bureau was first released in BTD6, although a few bug fixes were made in early versions of the game to address some unintended non-supported interactions.

Initial release (compared to BTD5)
  • Nerf Monkey Intelligence Bureau costs more ($4300 → $7500).
  • Buff [Bug fix] Ring of Fire and Inferno Ring now pop Purples when in range of MIB.
  • Buff [Bug fix] Monkey Sub with Advanced Intel now will (correctly) damage DDTs while the tower is in range of a MIB.
  • Buff [Bug fix] Wall of Fire attack can now pop Purples if the Wizard was in range of an MIB at the time of deployment.
  • Nerf [Undocumented, likely a bug] MIB no longer grants Ice Monkeys with frozen-popping power
MIB still wont [sic] allow ceramic/MOAB targeting early. But, Lead and Purple should be seen more as 'properties' rather than tiers of Bloon... So we agreed that it was a little weird that MIB wasn't at the very least allowing them to be targeted.
~ Rohan Spibo, Version 26.1 comment about Psi + MIB interaction
  • Buff Monkey Intelligence Bureau will now allow Psi to target Lead & Purple Bloons


Official artwork[]


  • The Monkey Intelligence Bureau upgrade icon is a monkey in black three-piece businesswear wearing black sunglasses.
    • The same upgrade icon looks similar to the COBRA's Misdirection tower avatar in BTD Battles.
    • The building could also be based off of the pentagon being shaped similarly.
    • It might be a reference to the movie Men in Black, considering the name, and the monkey with sunglasses in a suit.
  • According to Ninja Kiwi's 3rd June 2022 blog, the Monkey Intelligence Bureau provide the monkeys with special methods of defense, thanks to the investigative power of the MIB organization.