George and Harold's Treehouse is a stage in All Star Smashers.
- "Weird Al" Yankovic - Captain Underpants Movie Theme Song
- Dav Pilkey- The Adventures of Captain Underpants Song
- Donkey Kong 64- Fungi Forest Race
- The Flinstones (SNES)- Boss Battle
- Captain Underpants - Go Poopypants!- Unlock Professor Poopypants.