Appearances
Episode count
Print in bold means the character played a major role.
Season 1:
- Squidward the Unfriendly Ghost (debut, only in a magazine)
- Scaredy Pants
- Arrgh!
Season 2:
Season 3:
Season 4:
Season 5:
Season 6:
Season 7:
Season 8:
Season 9: It Came From Goo Lagoon