Captain Blunderpants is a villain in the Captain Underpants book series. He is the evil counterpart of Captain Underpants. He is from the opposite "Purple Potty" universe. When he is Mr. Krupp, he is nice. But when he is Captain Blunderpants he is nasty and evil. Contrasting from the Captain Underpants in the regular universe, when water is poured on his head, he becomes Captain Blunderpants, but when someone snaps their fingers he turns back into Mr. Krupp. Also, when Captain Blunderpants is in his bad form he has a toupee, but in his Mr. Krupp form he does not wear a toupee. He is the tertiary antagonist of Captain Underpants and the Preposterous Plight of the Purple Potty People. He appears in All Star Smashers as Captain Underpants' Memory Fighter.

How to unlock

Clear Lawl'dventure Mode as Captain Underpants.


Move Origin

Neutral B:

Move Origin


Move Origin


Move Origin


Move Origin

Final Smash:

Move Origin

KO Sounds and Taunts

KO Sound 1:

KO Sound 2:

Star KO:

Screen KO:

Up Taunt:

Side Taunt:

Down Taunt:

Victory Options and Losage

Option #1:

Option #2:

Option #3:


Moveset, KO Sounds & Taunts Music

Victory Music

Angry Boss Codec

Personal Data


  • Cartoon Size


  • Fat



  • Basically the same stuff Captain Underpants does



  • American

Classic Safari Story

Role in the Stretch Squad



All Star Smashers Logo

Limited Era Lee SaundersonSonny SlavenBrad TillMatthew WhiteheadHarry BradshawBrodi WelsfordAmanda the PandaOscar the White Tiger
Business Era MimeFanTalking JoePete the Cheerful Bus DriverHilaryEdward Yui
Attention Era Captain UnderpantsMaxwellPapa LouieHorrid HenryGarfieldYuuki Ogata
Invasion EraGo!CaillouAction 52Finn Palmer
HTML EraChadtronicBilly SlavenThin AirTim CarterAngry BossBrucetonDan GoughGrandpa Gorilla
End of the Crater EraElouise Pitman
Separation EraSuper Minecraft KidGreg Heffley
UpcomingHarry HillOtto HillTabatha the TortoiseOllie the Snow LeopardMoody MargaretProfessor PoopypantsSteve BurnsFred FlintstoneCaptain BlunderpantsDonny Dlaven


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