Demolition John

Demolition John (破壊屋ジョン, Hakai-ya Jon; Viz: Destroyer John) is a prisoner of the Smelly Lid Prison.

Appearance
Demolition John is a muscular man with a thick mustache and goatee. His head is bald with only three stripes of hair going down. He wears the standard striped, prisoner uniform.

Monster Association Arc
A cat-like monster broke into Smelly Lid Prison searching for Puri-Puri-Prisoner. Demolition John and the other prisoners question the monsters motives.

Prison
Demolition John greets Speed-o'-Sound Sonic by trying to make sure Sonic knows his place. Sonic disregarded him completely, promoting him to punch Sonic in the face. While gleefully stating that he never holds back, he noticed he punched a lead ball instead, breaking his hand in the process.