In its first three games, Bounder resembles a small humanoid child with two large, shiny eyes, a large, circular head, two circular hands, a black body, and tan skin. In Kirby's Toy Box, it has white skin, red eyes, red clothing, and purple feet. It underwent a redesign in Kirby Super Star, where it wears blue clothing and an orange backpack with a single strap around its neck. In this appearance, it has pale skin, red feet, eyes with blue irises, and what appears to be a single antenna coming out the back of its head. Bounder no longer has arms to connect its hands to its body.
Bounder makes its first appearance in this game. It clings to walls and sometimes jumps from them in an effort to hit Kirby. They are also capable of throwing small stars.
While Bounder makes an appearance in this game, it does not appear in the remake, Kirby: Nightmare in Dream Land, instead being replaced by an enemy named Gip. The only difference between Bounder and Gip is in appearance, as their attack methods are completely the same. The reasons for this change are not known.
Bounder reappears in this title, behaving similarly to how it did in Kirby's Adventure. However, Bounder is again replaced by Gip in this game's remake, Kirby Super Star Ultra, for unknown reasons.
Bounders also make appearances in Kirby's Pinball Land and Kirby's Block Ball. In these games, they are far more rare, with the only two of them being in the top stage of Whispy Woods Land. They also behave slightly differently, passively climbing around their territory. In addition, Bounder makes a cameo in both versions of Megaton Punch.
Bounder's name comes from the word "bound," which can mean "to move by leaps; leap; jump; spring," referencing its behavior of jumping from the walls.
- Rolling Turtle, Capsule J, Togezo, and Bounder are currently the only enemies to have been replaced by other enemies in their respective game's remake.