Robot Walker

The Four-Legged Robot is an enemy only appearing two levels of one game.

Crash Bandicoot 2: Cortex Strikes Back
In this game they're legs appear as that of a horse's. They're upper body's look like a life preserver constructed out of lava. Above that looks like an orange cap atop it's robotic head. They only appear in two levels.

Piston It Away
Where they first appear.

Spaced Out
Where they last appear.