Slime

A Slime is a white, gooey, creature made of slime. Slimes live in Yoshi's Island, but mainly appear in Tap-Tap the Red Nose's Fort, and Bowser's Castle, carrying a key in the latter stage. Unlike Salvo the Slime, they do not shed Lemon Drops when hit with Eggs.

Slimes appear in the mini-game Slime Time in Mario Party 4. They come in many different colors, instead of just white.

Salvo the Slime is actually not a Slime, but a Lemon Drop transformed.