リアルバウト餓狼伝説
In all of the games he appears, Billy is blonde and covers his hair with a red and white bandana. However, he constantly changes his outfit in various games. In the first "Fatal Fury" game, "The King of Fighters '95", and "The King of Fighters XIII", Billy sports brown shoes, with blue jean overalls and black fingerless gloves. In "Fatal Fury 2" and "Fatal Fury Special", Billy sports a tank top with a Union Jack in the top. He also wears light blue jeans, blue fingerless gloves and red boots. In the "Real Bout Fatal Fury" series and most "The King of Fighters" games Billy wears a dark blue opened leather jacket, dark blue jeans held with a brown leather belt and brown boots. In ' and "The King of Fighters 2003", he wears a similar outfit from the "Real Bout Fatal Fury" series but with a black and yellow opened leather jacket, wristbands, black jeans and black boots. In both "Wild Ambition" and ', Billy has an alternate costume similar to a formal suit with a necktie and gloves. In "The King of Fighters XIV", Billy wears an entirely new outfit consisting of a dark blue leather jacket with a red t-shirt saying "Know Your Enemy" underneath, alongside matching pants and black boots. His bandana has an inverted union jack design with his old white and red bandanna wrapping his right pant leg. He now wears black gloves to go with this outfit, possibly to keep his hands cool from the flames made by his staff.