Sebastian is the pet lizard of Rascal. He is a green lizard with three rectangular spikes. He has yellow sclera and dark green scales. When he hisses, he has fangs in his mouth.
- Main article: Sebastian/Gallery
| Main: Unikitty / Puppycorn |
Dr. Fox / Hawkodile / Richard
Antagonists: Doom Lords (Master Frown ) / Brock / Score Creeper / Eagleator / Giant Jelly Creature / Friend Guy / Cupcake Monster / Wish Coins / Sandman
Supporting: Action Police / Dino Dude / Dr. Fox’s Robots / Kickflip / FeeBee / Security Robot / Mark 1 / Rock Guy / Pet Pet / Theodore / Ted Butter / Bim-Bom / Craig / Toaster and Toast / Background Characters