Bowser (AKA "King Koopa") is portrayed as the "King of the Koopas," a race of anthropomorphic turtles that inhabit the world of the Mushroom Kingdom. Bowser differs greatly from the rest of his clan, which consists mainly of bipedal tortoises. His iconic features include a large, spiked turtle shell, horns, razor-sharp teeth, and a shock of red hair. He is physically powerful, can breathe fire, and has skills in black magic. He can also jump surprisingly high for his large size, although his agility is somewhat lacking.
Fuse's attempt to take over the cartoon multiverse has forced Bowser into an uneasy alliance with Mario.