Here's a list of all the characters that has appeared in Robotboy.

Main Characters[]
Supporting Characters[]
Main Villains[]
- Dr. Kamikazi
- Constantine
- Bjorn Bjornson
- Bjornbot
- Felonious Hexx
- Klaus Von Affenkugel
- Ludwig
- Special Agent
- Protoboy
Bullies[]
Children[]
Minor Characters[]
- Ambassador's butler
- C.H.O.P (character)
- Farmer Stenkie
- Miumiu
- Romcroft
- Ronald Rump
- The Doctor
- The Elderly Woman
- The Tour Guide
- Vance Cosgrove
- The Human Fist
- The Inhuman Toe
Minor Villains[]
One-time Villains[]
- Agent Kalaschnikov
- Aunty Gravitee
- Bandana Bendito and Harry "The Spleen Crusher" Jackson
- Dog-Ra (Character)
- Evil 17
- Green Alien Minions
- Gilbert
- Guab
- Lance Chestwax
- Princess Justine
- Screaming Scott
- S.M.T.H.R.S
- S.U.B
- The 2 Old Thieves at the Museum
- The Green Alien
- Von Der Schnitzel
- Waitress Lady
- Walter the Tapeworm
Parents[]
- Ambassador Mbola
- Bambi's Mother
- Bjorn's Mother
- Debbie Turnbull
- Dwight Turnbull
- Dr. Kamikazi
- Grandma Turnbull
- Hester Turner
- Jebedaiah Turner
- Moonglow
- Mother Kamikazi
- Professor Moshimo
- Miumiu
- Special Agent
- Wallie's Dad
- Wallie's Mother
Robots[]
- Bambi-Bot
- Constabot
- C.H.O.P
- Cruelio
- Dog-Ra
- Nagbot
- Mona Lethal
- Ogbot
- Protoboy
- Roboboy
- Robotbird
- Robotboy
- Robotgirl
- Robotman
- Robomonkey
- S.M.T.H.R.S
- S.U.B
- The Assassin Drone
- The Cast Bot
- The Superactivation Exoskeleton-belt
- T.O.A.S.T
- Yakitori's Battle Mechs