Del Uglio is Billy's long lost twin brother, despite the fact that they look nothing alike or are even the same age because they both have a birthmark that combines to create a map to an ancient treasure. His name is supposed to translate into "The Ugly", but the correct Spanish for it would be, "El Feo". He is a Mexican wrestler with a high temper and is considered the ugliest man on earth. He calls Billy "hermano", which is Spanish for "brother".