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           Robotboylogo.png Villains

Major/Reoccurring Villains
Dr. Kamikazi | Constantine | Kazi Clones | (Stevie | Betzi | Drip and Ooze) | Special Agent | Bjorn Bjornson | Bjornbot | Protoboy | General Yakitori | Klaus Von Affenkugel | Ludwig | Felonious Hexx | Donnie Turnbull | Kurt | Stu | Mookie | Vance Cosgrove | Brian the Consultant | Brainy Yak | Dr. Freeman Coldpepper | Mr. Yaschinshki | Ronald Rump |

Minor Villains
Dog-Ra | Robotman | Agent Kalaschnikov | Mona Lethal | Cruelio | Gilbert | Roboboys | Lance Chestwax | S.U.B | Princess Justine | Clammadon | Aunty Gravitee | Guab | Green Alien |