Original: Despite his lack of dialogue, Kirby narrates the functions of certain Copy Abilities on the pause menu in Kirby: Nightmare in Dream Land, Kirby & the Amazing Mirror, and Kirby: Squeak Squad.
Simplified: He has the ability to copy enemies' abilities (special powers). He has been in a number of video games including Kirby's Adventure, Super Smash Bros., Kirby's Dream Land, Kirby: Nightmare in Dream Land, Kirby: Squeak Squad, and Kirby: Canvas Curse.