Bowser is the main antagonist in the Super Mario franchise, and one of the primary antagonists of this game! He is a large, powerful, fire-breathing Koopa who leads the Koopa Troop, an antagonistic organization of turtle-like creatures, and has been the arch-nemesis of Mario since his debut in Super Mario Bros. He has repeatedly kidnapped or attempted to kidnap Princess Peach with the ultimate goal of defeating Mario and taking over the Mushroom Kingdom. Bowser's defining traits are his monstrous appearance, full-throated roar, fire-breathing abilities, cruel personality, reptilian voice, and never-ending conflict with Mario and his unrequited crush for Peach.

He has a deep growling voice, don't be afraid to use some audio effects if you can't go that deep.