Cast[]
- Squidward as Cat (both are grumpy and angry with Spongebob and Dog)
- Spongebob as Dog (both are clueless and happy-go-lucky and voiced by Thomas James Kenny)
- Rocko (from Rocko's Modern Life) as Winslow
- Sheila (from Rocko's Modern Life) as Sadie
- Spongebob's Mom as CatDog's Mom
- Squidward's Dad as CatDog's Dad
- Mermaid Man as Mean Bob #1
- Barnicle Boy as Mean Bob #2
- Sizz-Lorr (from Invader Zim) as Cliff
- Sandy Cheeks as Shriek
- Patrick Star as Lube (both are tall, lazy, and slow-witted)
- Mindy as Lola
- Squilliam as Randolph Grant
- Betty Boop (from Betty Boop) as Tallulah
- Cheerleaders (from Fanboy and Chum Chum) as Ingrid Twins
- Mordecai (from Regular Show) as Mervis
- Rigby (from Regular Show) as Dunglap
- Eeyore (from Winnie the Pooh) as Mr. Sunshine
- Plankton as Eddie the Squirrel
- Mr. Krabs as Rancid Rabbit