Felonious Hexx

Felonious Hexx

First Appearance
Last Appearance
Voiced by
Magic, Dark Magic

Felonious Hexx (formerly Thelonious Hexx) is a magician, who despises Gus and is his archenemy. He was voiced by Lewis MacLeod.

Tragic Magic

He was shown here as a professional magician. He wowed the crowd with incredible feats of secretly real magic. However Gus, being his usual self, was not impressed with the show no matter how amazed the rest of the audience was, and contiunually jeered, insulted and mocked the otherwise brilliant magician. This lead Hexx to become angry and lash-out with his magic. Which after a scuffle with Robotboy got him fired from his job and kept him from black balled from performing ever again. From then on, Hexx became Gus's archrival.

Nursing a Grudge

Hexx became a nurse working at Gus's elementary school where he spent his days removing the lice from children's heads, and begging them to let him perform at their parties to no success (conjuring ferocious tigers in front of small children is not as good a sales pitch as it should be). Unfortunatly he encounters Gus who, forgetting how powerful Hexx is and how much danger he was in last time continues making fun of him. The enraged magic decides on a little surgery and swaps Gus's mind with a pigeon.

Robotboy still manages to stop Hexx from any more magical mayhem, though Gus remains a pigeon afterward. Which worked out well for everyone, since the pigeon was nicer, and smarter than Gus.

Gus's Big Mouth

This time Hexx works in a dentists office, once more using his powers in a position beneath him, and where he once again encounters Gus, who once again forgets Hexx both hates and is willing to hurt him when he starts belittling him again, even as he sits back and lets Hexx operate on his mouth.

Hexx decides it's high time Gus's big mouth come back to bite him and gives him magic dentures, which force him to say the worst possible thing at the worst possible time. From insulting teachers, to angering scary bikers.

Eventually Hexx is again defeated, with the teeth in his own mouth just as the bikers chasing the big mouthed Gus arrive.

Bad Nanny!

Felonious dressed as an obese Scottish nanny named Mrs. Loutfire (An obvious parody of Mrs. Doubtfire) to use dark magic on Tommy and Gus. He turned Gus into a zombie. The spell was broken when Dwight opened the door in Felonious's face and he was knocked unconscious.


Fhexx beta

Felonious' design in A Tale Of Two Evil Geniuses

  • His very first appearance was in fact on the episode "A Tale Of Two Evil Geniuses" but he had a different hair color which was more orange and more purple shaped clothes while the design remains equal.
  • Hexx seems familiar to another magic-wielding magician/sorcerer also named Hex (albeit with one 'x') from the hit show, Ben 10, which aired a little over a month after Robotboy did. This was probably more of a coincidence, however.
  • While his character officially appears firstly on the episode "Nursing a Grudge" his real first appearance is supposed to be "Tragic Magic" where his wrath on Gus begins.
  • Lola is the only one of the main characters who has never met Felonious Hexx. Nor has she ever been told about him.
  • Robotboy never Superactivated to battle Hexx, so he is the only villian that never seen Robotboy's Superactive Mode.
  • His head resembles HIM from The Powerpuff Girls, another show made by Cartoon Network.
  • His head also resembles Waluigi from the Mario series.
  • It's not known how Hexx learned how to do real magic alongside his stage-magic (from which he learned in magic school). It can only be assumed that he is really an actual sorcerer who just wanted to entertain people by combining both skills. In a show with aliens, fighting robots, a cyborg general, mutated yaks and badgers, this wouldn't seem too farfetched.
    • Unless, when Hexx mentioned "Magic College" in 'Bad Nanny!', he could have meant literal magic college, where he probably did learn sorcery while he learned stage-magic at a normal, human magic school.
  • In the Dutch Dub of Robotboy, he changes his name exact the opposite from the English version. So Felonious Hexx becomes Thelonious Hexx. This only happened in the episode Tragic Magic (Tragisch Magisch in Dutch). In Nursing a Grudge it is changed into Felonious again, and in the other episodes (Bad Nanny and Gus's Big Mount) he is only addressed as Hexx. He is also the only character from Robotboy in the Dutch dub that had three(!) different voice actors. In every episode he appears, he has a different voice. Only in Nursing a Grudge and Gus's Big Mouth he has the same voice actor (Ruud Drupsteen) but he talks in both episodes with a different accent

International Dubs

Languages Voice Actor
Dutch Ewout Eggink (Tragic Magic)

Thijs van Aken (Nursing a grudge, Gus's Big Mouth)

Ruud Drupsteen (Bad Nanny)


Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.