Replaces arm with a strong bionic arm that can throw boomerangs extremely fast and do more damage to MOAB class Bloons.
~ BTD6 description
Bionic Boomerang is the third upgrade in Path 2 for the Boomerang Monkey in BTD6. The Bionic Boomerang upgrade increases attack speed for the Boomerang Monkey by around 2.84x, from every 0.675s to every 0.238s, as well as dealing +1 damage to MOAB-class bloons.
It costs $1360 on Easy, $1600 on Medium, $1730 on Hard, and $1920 on Impoppable.
The Bionic Boomerang is usually used as a stepping stone for its higher tiers Turbo Charge and Perma Charge. It doesn't have much of a specific niche, being an average and well-rounded early DPS tower.
Usually, 2-3-0 is better than 0-3-2 because the Glaives upgrade grants a lot of extra pierce over +1 damage and remaining at a small pierce.
Place Bionic Boomerang around a good curve, in order to maximize its attack.
Bionic Boomerang has been buffed slightly, and now deals extra MOAB-class damage.
The base Boomerang Monkey attack speed buff in Version 26.0 mainly affects 0-3-2 Bionic Boomerang and has a negligible effect for 2-3-0 Bionic Boomerang due to the removed Glaives attack speed bonus equating to less than the new bonus base attack speed.
Bionic Boomerang damage to MOAB-class increased by +1
The +1 damage to MOABs for Bionic Boomerang now (correctly) applies to all MOAB-class bloons
[unintentional bug] Bionic Boomerang attack speed has not scaled with the base Boomerang Monkey buffs, causing 2-3-0 to become indirectly nerfed.
[...] Bionic Boomerang’s base attack rate has been improved to compensate for recent reworking of the 2xx Glaives Crosspath
~ Ninja Kiwi, referring to Bionic Boomerang buff
Bionic Boomerang attack delay reduced from 0.28s -> 0.238s
Extra Notes (Version History)
The interpretation of the 26.0 base Boomerang buffs was different among the community. Other experts believed that the Bionic Boomerang was unaffected by the 26.0 rework, while Bloons Wiki interpreted this as an inherited buff. This was later proven in favor of the other experts with the 27.0 Bionic Boomerang buff, which is actually a bug fix listed as a balance change.
Crosspathing in BTD6 (path 1 on top, path 3 on bottom)
In the description, it says "Replaces arm with a strong bionic arm". However, it seems that if the Bionic Boomerang switch hands using the "Change hands" targeting priority, the bionic arm returns being a normal arm, while the other arm changes to a bionic arm. This may suggest the "bionic arm" is actually a mechanized gauntlet, even if the elbow part of the bionic arm is thinner than the Boomerang Monkey's arm.
In BTD6, the Bionic Boomerang keeps its jumpsuit, while in BTD5 it loses its jumpsuit completely. Interestingly enough, Kylie Boomerang is now the upgrade that loses the Boomerang Monkey's jumpsuit when upgraded, although the Kylie Boomerang will feature Australian-inspired clothing instead.
Bionic Boomerang was not affected by the Faster Rangs attack speed buff in Version 7.0.