Super Diaper Baby | Captain Underpants Wiki | Fandom
Super Diaper Baby calls Diaper Dog, Doggy all the time. Billy was called Super Diaper Baby by other characters only once in the first book. Billy was named after his weak, scaredy Father, Bill. Billy is shown to have laser eyes on the online game, but he doesn't use them in his books. Super Diaper Baby's favorite drink is an Apple Juice Box.