Over the course of the cartoon series, which makes up its own particular canon, Evil is more concentrated on destroying the universe, rather than obtaining Jim's suit (even though one episode began with Evil stealing Jim's suit in an attempt to destroy him). He has been continuously thwarted by such forces as origami, the Department of Apocalyptic Affairs, and even the cartoon's budget running out. "A minor setback" is Evil's usual response to his misfortunes. He is frequently assisted, but more often annoyed, by his aide Henchrat.
In spite of his status as a pure evil villain, Evil occasionally shows the behavior of a real cat, such as licking himself or playing with a ball of yarn when he's bored. In Earthworm Jim, he'll actually stop to groom himself a bit in between shots of his huge fireball gun, then has to be killed nine times (a joke on cats having nine lives) to be defeated for good.
According to the instruction manual to Earthworm Jim 2, Evil has a cousin named Flagitious, who runs "The Circus of the Scars". During Heck's summer off-season, Evil switches jobs with Flagitious and runs the circus himself.
In the animated series, Evil will try to disguise himself to try to get close to Earthworm Jim, and will often interject "Did I mention, I'm not a cat?". He is voiced by Edward Hibbert.
- Species: Anthropomorphic Demonic Cat
- Fur Color: White
- Eye Color: Yellow (with dark red pupils)
- Friends: Psycrow, Professor Monkey-For-A-Head, Evil the Cat, Queen Slug-For-A-Butt, Bob the Killer Goldfish, Evil Jim
- Enemies: Earthworm Jim, Peter Puppy, Princess What's-Her-Name, Snott
- Voice: Edward Hibbert