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The Monstrous Mayhem of the Massive Melviathan is the 31st episode of The Epic Tales of Captain Underpants.


Mr. Krupp makes the kids do arts and crafts so he can sell for the worth of the LeisureMyLand. However, an anomaly in their creations sends them into the Dream Dimension, a place where dreams are reality. Melvin tricks Harold into dreaming up their worst nightmare, Melviathan. If real Krupp is back at the actual camp, who will save the day?


  • Other Sophie's voice is heard yelling and screaming when she finds a giant bird in the forest, even though Jessica made up a rule that Sophies aren't allowed to talk, which was mentioned in The Abysmal Altercation of the Abominable Altitooth.
  • Melvinathan is obviously based on the Leviathan.
  • This is the second episode where the original Mr. Krupp doesn't turn into Captain Underpants.
  • Other Sophie is the only student who wasn't at dream camp.
  • George and Harold's dream camp share many similarities with both Ninten's and Ness' Magicant, with both of them being dream-like realms adjacent to reality, inhabited by strange creatures.
  • Moral: Without bad, there isn't any good.