"The Old Switcharobot" is the 92nd episode of the series and the 7th(b) of Season 4 of Robotboy. In this episode, Protoboy returns and fights with Robotboy until he's defeated and changes his personal chip with Robotboy's so that he can get into Moshimo much easier for revenge.



  • The episode is a portmanteau of "The Old Switcheroo" and "Robot".
  • This is the second time Robotboy is involved in a mind-switch, the first time he was was in "Robogus and the G-Machine".
  • This is the first appearance of Donnie Turnbull since Vitamin Sucker, however he was mentioned in Gus's Mix and there was a trashcan version of him.
  • By the next episode, Robotboy is normal
  • When Protoboy (inside Robotboy's body) becomes crazy in the first seconds his eyes resembles the ones Robotboy had in "Rowho?"
  • The only episode involving Protoboy that was written by Dani Vetere.
  • The only episode with Dr. Kamikazi without Constantine. He appeared for just a few seconds in the flashback from Professor Moshimo
  • This is the first time that Gus and Protoboy appear in the same episode. But Gus does somehow already know Protoboy and is afraid of him. This is odd, because in Protoboy's first episode Brother was a episode without Gus.
  • Goof: When Donnie is falling in the pit, the skull from his grey shirt from series 1 re-appears on his red shirt.
  • When Gus is teasing Protoboy, he's singing U.G.L.Y., a song by Daphne and Celeste.
  • This is the first and only episode where Protoboy makes more expressions rather than being constantly angry, mainly because Robotboy was inside his body and is known to make a lot of expressions in his own body.
  • Also, Robotboy does not speak while Superactivated in Protoboy's body, possibly because he can't or chooses not to in his own SA mode. It's also interesting to note that Protoboy doesn't speak while Superactivated in Ro's body, even though he can in his own SA mode.
  • Protoboy's eyes look similar to Ro's about four times: first after Protoboy puts his motherboard into Robotboy's body and cuts it from his own, secondly before Ro's motherboard attaches to Proto's body, thirdly before Robotboy-in-Protoboy's body face palms because of Gus, and lastly when Ro Superactivated in Proto's body and his arm cannon fell out.

In other languages

Int. Language Int. Title Translation
Dutch De Wisseltruc the switcheroo
French Un Robot peut en cacher un autre A Robot can hide in a other one
German Der gute alte Rollentausch The good old roll replacement
Hungarian Egy KiszuperĂĄlt Robot A discarded robot
Spanish El viejo Switcharobot The Old Switcharobot


Watch the episode

The Old Switcharobot

The Old Switcharobot