Bonkers is a gorilla/troll-like mini boss that has armor and a giant hammer. They sometimes toss coconuts that Kirby can inhale and spit out causing damage to Bonkers. Certain coconuts are larger and will explode and in games with health bars these do more damage. When Bonkers is swallowed, Kirby gets the potent Hammer ability. In Kirby Super Star and Kirby Super Star Ultra, he appears as the Helper for the Hammer Ability. However, unlike Kirby he can't use the hammer throw, probably because Helpers cannot lose their abilities. In Helper to Hero, he wears a red shirt rather than a purple one and he resembles the artwork for him in Kirby's Adventure.
In Kirby Super Star Ultra, When Kirby's Grab (Beam, Fighter, Ninja, Bomb, Yo-Yo, Jet, Parasol, Ice, Suplex) some ready to catch that made a Bonkers explode and then they damage enemies, killing enemies, damaged bosses.