Lionell is a talking hamster that switches minds with Meatwad in the episode, "Rabbit, Not Rabbot". He has orange fur with white stripes, small ears, a pink nose, and two black eyes with white pupils. He assisted Dr. Zord in switching minds with Shake, by carrying him to the fountain and hydrating him so he would urinate.
In "Rabbit, Not Rabbot," after Dr. Zord successfully switches the minds of Randy the spider and Frylock, he convinces Meatwad to swap brains with Lionell. Meatwad then pees in the fountain as lightning strikes, changing the minds of Lionell and Meatwad. After Dr. Zord is bitten by Frylock and dies, it is unknown what happens to Lionell, as he isn't seen for the remainder of the episode.