Chomper
Chompers, also referred to as dogs or wolves, are one of the common enemies in both the Wonderland Adventures series and Classic Trilogy.
Classic Trilogy
In the Classic Trilogy, Chompers will attempt to reach a certain character, but are not intelligent enough to go around walls. They come in two versions, Red Chompers and Gold Chompers. Red Chompers follow Stinky if he's present, and Gold Chompers follow Loof if he's present.
Wonderland Adventures
In the Wonderland Adventures series, they come with a fully customizable speed setting and a special setting, and will go around walls to reach the player character. The special setting can be set to --- (Chomper acts normally), Ghost (Chomper is semitransparent and goes through certain collectible objects), or Glow (Chomper glows in the dark). If the speed is set to a low negative number (e.g. -23), the Chomper will cease to move.