Hammer Bro

Hammer Bro is a member of the Koopa Troop who stands upright and throws hammers at the player. He is one of the hardest enemies to defeat, mainly due to the fact that he throws hammers. His variants include Boomerang Bro, Fire Bro, Sledge Bro, and Ice Bro. His special item is the Hammer Flower, which allows him to throw hammers.

Koopa Kart series
Hammer Bro is a playable character in the Koopa Kart series in every game, being one of seven characters to appear in every game (the other six being Bowser, Dry Bones, Koopa Troopa, Goomba, Monty Mole, and Paratroopa). He is a heavyweight driver in the first four games, while he is a middleweight starting from Koopa Kart DS. In Koopa Kart: Double Trouble!!, his partner is Dry Bones, and their Special Item is the Blue Shell.