Rat

Rats are enemies encountered throughout the Crash Bandicoot series. They can be s-een wandering around aimlessly in dark, loomy places such as Cortex's Castle, Ruin levels, etc. They are sometimes stationary or they move back and forth on a set path in Crash Bandicoot 2: Cortex Strikes Back. Notably, rather than squeaking they make a snarling sound as Crash approaches them.

Rats were seen again around the Academy of Evil and it's hidden Boiler Room on a much more larger scale than in their first appearences.