Gooey

Gooey is Kirby's best friend, and described as a friendly blob of Dark Matter. He first appears in Kirby's Dream Land 2, and could be found in the various bags in the game under certain conditions. In that game, his only function was to restore Kirby's health, but in Kirby's Dream Land 3 he was a playable character. He is essentially a small blue blob of goo with a silly expression on his face. Gooey has similar powers to Kirby, except that he licks up enemies, can lick up stars, and can devour enemies underwater. However he can't eat two enemies at the same time. A second player can take control of him while the first player controls Kirby. In a single player game, Gooey can be summoned as a computer-controlled ally and during the game's final battle in space, Gooey's flying form is similar to Dark Matter. Sometimes he can be a bit annoying by licking enemies you want and killing them.

Trivia

 * Gooey appears as a trophy in Super Smash Bros. Melee
 * Gooey acts almost exactly like a Yoshi from the Mario series, the only difference being that Gooey doesn't lay eggs.