There are five unused icons in the game's files that might be from characters that went unused in the final game. They include Mandark, Wilt, Gwen, Schnitzel, and Captain Sticky Beard from Dexter's Laboratory, Foster's Home For Imaginary Friends, Ben 10, Chowder, and Codename: Kids Next Door, respectively. All of these characters (aside from Wilt) appear as assists in the game.