Main Characters Oscar 20 main appearances Bea Goldfishberg 20 main appearances Milo 19 main appearances
Recurring Guest Characters Principal Stickler 22 guest appearances Pirahnica 7 guest appearances Headphone Joe 4 guest appearances Bo Gregory 3 guest appearances Bea's Mom 2 guest appearances Mr. Nibbles 2 guest appearances Bird 1 guest appearances Steve Jackson 1 guest appearances Mrs. Goldfishberg 1 guest appearances Shellsea 1 guest appearances