He is a pale, skinny, gnarled man who wears a dark hooded shirt. Several of his lines in his debut episode "The Janitor Strikes Back" (the title, of course a nod to The Empire Strikes Back) are direct parodies of lines spoken by Palpatine and Darth Vader. For example, Poopatine says, "And now, gum, you will die", which is a take on "and now, Young Skywalker, you will die". In the episode "Fanboy Stinks", Poopatine attempts to wrangle Chum Chum's pecan log stuck to the floor, falls over and says "The force is strong with this pecan log". Poopatine rides around in a cart he named Brenda, which communicates by beeping in a manner similar to R2D2.
Poopatine has a strong hatred of gum and saltwater taffy. Poopatine tries to destroy the bubble gum monster Yum Yum, until it saves his life. In "The Janitor's Apprentice", it is revealed he has a trash collection and a trash receptacle called the "Dump Star", a nod to the Star Wars "Death Star" and a pun on the word "dumpster". As a running show gag, whenever Poopatine's name is spoken, Chum Chum says, "Poop!".
- He is voiced by Steve Tompkins.