Teachertrons

The Teachertrons are robots built by Melvinborg. They first appear in "The Tenuous Takedown of the Tyrannical Teachertrons."

The Epic Tales of Captain Underpants
In "The Tenuous Takedown of the Tyrannical Teachertrons," they mutate to be bigger and are stopped by what Melvin teaches

The Interactive Insanity of the Irritating Interlopers
In this interactive adventure, the Teachertrons show up to stop George and Harold when they are in Teachervile. However, this only happens if the audience chooses to find treasure and chooses the Apple core instead of the fish bone.