Mario and Luigi's lifelong foe has partnered up with Voldemort to combine their forces into one unstoppable army. Despite their partnership, Bowser expresses agitation and annoyance to his co-partner in almost every regard. In stark contrast to Voldemort's grace and elegance. Bowser is loud and brash with a big temper and a huge ego. He takes great pride in his strength and powers as well as his authority over others, something he expresses annoyance over should Voldemort ever cross it.

Voice:
Bowser's voice is up to interpretation. But overall, it should be a deep and growly monster-like voice. He is a giant fire-breathing reptile after all. A loud and booming voice to contrast with Voldemort's more elegant voice.