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

They have robotic talents, and they can also transform into a giant Teachertron.


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. After being defeated, Grace Wain declares robot teachers a school-zone violation, preventing them from being used again.

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.


  • The Teachertrons are likely named after Megatron from the Transformers series
    • Their combined form is likely based after Devastator