Boomer (Super Mario RPG: Legend of the Seven Stars)

Boomer is a cannon-like enemy from Super Mario RPG: Legend of the Seven Stars, and a member of the Smithy Gang. He was put in charge of Bowser's Keep and Mario had to beat him to challenge Exor. Despite his cannon in his head, he uses a katana to fight Mario, and fought on the same chandeliersthat Mario fought Bowser on at the beginning of the game. When Mario beat him, he tragically commited suicide, falling off the chandelier to his doom.