Mugley is a scrawny, underweight boy with a dark brown bowl haircut and a pair of green thick-rimmed glasses. He wears a very loose-fitting red wrestling leotard, a pair of blue wristbands, and a pair of red wrestling boots.
Mugley is a very scared child, as shown by the way he reacts to his fights. After he made it to the finals of the 31st World Martial Arts Tournament, Mugley wins the Junior division by running up to Goku and almost knocking him out of the ring while Goku was distracted by Vegeta. Goku held onto the arena's edge, but Mugley tickled him off.
- Chico Torture – Mugley tickle tortures his opponent. Used to win the 31st World Martial Arts Tournament.
- Mugley's name seems to be a pun on the word "Ugly".