Buyon is a large pink monster who was kept in the Muscle Tower by General White. When Goku and Eighter reach the fifth floor, where the command room is, White activates a trap, making the two to fall into a room where Buyon is. Goku tries to fight the monster, but all of his attacks are deflected by Buyon's gelatinous body, deflecting even a Kamehameha. Goku then has an idea, breaking the wall of the tower to make the cold air of the outside to enter, freezing Buyon solid and then shattering him into pieces.
Buyon also appeared as a boss character in Dragon Ball: Revenge of King Piccolo.