Captain Underpants/Benjamin Krupp

Captain Underpants is a parody superhero from the popular children's book franchise of the same name.

Wardrobe
His costume consists of underpants and a red cape.

Origin
Mr. Krupp has punished George and Harold for vandalizing the Hortwiz Knuckleheads Game. Soon, George and Harold have got sick of being punished and bought a 3D-Hypno Ring and hypontized Mr. Krupp, morphing him into Captain Underpants