Knockback

"Bloons get pushed backwards or slowed after each hit."

- In-game description

 is the first upgrade of Path 3 for the Super Monkey in Bloons TD 6. It adds knockback to every attack, allowing Super Monkey projectiles to push back or slow down bloons with each hit. It will push back non-Lead and non-Ceramic bloons by 25%, and slow down Leads and Ceramics (including their fortified variants) by 60%. MOABs are slowed by 30% (except the BAD, which cannot be slowed at all). The knockback effect lasts for 0.1s per hit.

It costs $2,550 on Easy, $3,000 on Medium, $3,240 on Hard, and $3,600 on Impoppable.

Apperance
This upgrade gives a yellow stripe on Super Monkey's head.

Summary
Knockback allows the Super Monkey to inflict knockback effects onto affected bloons, giving defenses more time to destroy the affected bloon(s), especially for the Super Monkey itself. It serves highest value against stronger bloons such as the early Round 40 MOAB.

Tips

 * One 0-0-1 Super Monkey is can be used to slow the MOAB on Round 40, including on Alternate Bloons Rounds. Range upgrades with 0-1-1 and 0-2-1 not only make the Super find more opportunities to slow down the MOAB, its extra pierce also lets it knockback Ceramics more efficiently too.
 * When looking for reliable sources of knockbacking, it is worth knowing how each of these cross upgrades interact.
 * 3-0-1 Sun Avatar can knockback up to 6 bloons per sunbeam, 3 sunbeams per shot, and at double attack speed. Additionally, it can pop Leads but not Purples (unless Strike Down the False MK is active). It has the default Super Monkey range, though its range could be further increased with the upgrade Ultravision.
 * 0-3-1 Robo Monkey can knockback up to 6 bloons per dart from its 2 separate arm attacks. It can pop Purples but not Leads. It has good range, and it can be further improved with the Ultravision upgrade.
 * 0-0-3 Dark Knight can knockback up to 5 bloons per dark blade, can deal +2 damage to MOAB-class, and it can be crosspathed with other paths for additional benefit, preferably Path 1 with the double attack speed and +2 pierce.
 * As of Version 12.0, the nerf to the knockback towards Ceramics makes it difficult to stall Super Ceramics in place. In fact, the new knockback effect to Ceramics is now similar to that on MOAB-class bloons.
 * Dark Knight restores 90% knockback to Leads, Fortified, and Ceramics, requiring Dark Champion to reach the full amount.

Trivia

 * This upgrade is the only upgrade below Tier-3 that costs exactly $3000 on Medium for the upgrade alone.
 * The Knockback upgrade is also the most expensive of all Tier 1 upgrades in the game.
 * This upgrade costs the same as the Super Monkey did in BTDB Mobile since Version 4.6. Likewise in BTD6, Laser Blasts now costs the same as the Super Monkey does in BTD6.