Here are the list of animal species in "My Gym Partner's a Monkey".
- Humans: Adam Lyon, Kerry Anderson, Chad, Fake Possum Girl, Amazon Kevin, Zira Cornelius, Benny Two-Tooth, I Didn't, other humans.
- Slender loris: Mrs. Slenderloris
- Grouper: Mr. Grouper
- Cheetah: Coach Cheetah
- Dolphin: Phineas Porpoise, Donna Dorsal
- Pandas: Dingbang (revealed to be Larry in disguise; two unidentified female pandas
- Pufferfish: The Puffer
- Bat: an unnamed member of Bull's gang; other bats
- Wombat: an unnamed member of Bull's gang.