Homestar Runner - SpongeBob SquarePants
Strong Bad - Squidward Tentacles
Pom Pom - Patrick Star
Marzipan - Sandy Cheeks
Coach Z - Plankton (Plankton is evil but he did change (almost) in "Sponge Out of Water.")
The Cheat - Gary the Snail
King of Town - King Neptune
The Poopsmith - The Flying Dutchman
Strong Sad - Mrs. Puff
Strong Mad - Larry the Lobster
Bubs - Mr. Krabs
Homsar - DoodleBob
Senor Cardgage - Squilliam Fancyson
Stinkoman - Sour Note