Allan was happy living in Tastyville, but during high school, he had to move with his parents to the dingy streets of Oniontown. Being the new kid, Allan got picked on by the hardened students of Oniontown High. He always stuck up for himself, even if it meant a black eye or a chipped tooth. When Allan graduated, he moved back to Tastyville. His friends were happy to see Allan, but Oniontown had definitely changed him.
Originally, Allan wore a green polo shirt, blue jeans, and black and grey shoes. His hair was spiked in the front and he had short eyebrows. Since his return in Papa's Taco Mia!, he wears a white shirt, green jacket, blue jeans, and shoes with green laces. Allan's hair is now styled into a pompadour and he has grown sideburns. He has a unibrow and a missing tooth.
Allan's style B is his hockey uniform. He wears a black helmet. His hockey sweater is black with light blue and purple trim and his team's logo. His pants are purple with black trim and his shoes is black with gray soles and light blue laces. He also sports a black eye.