Magma Bowser

Molten Bowser is a form Bowser takes as Hammer Slam Bowser in the game Skylanders: SuperChargers. In this form, Bowser's melee attacks are augmented by fire, allowing him to unleash fiery claw swipes, his signature Fire Breath, and summon flaming Dry Bones.

Trivia

 * Giga Bowser was briefly considered as a transformation for Bowser for his Skylanders: SuperChargers appearances instead, but was ultimately declined in favor of Molten Bowser.