A Koopa in Remnant. This is to give you an idea on their voices.
Bowser- Jack Black (Never changing this!)
Bowser Jr- Tara Strong
Kamek- Kevin Michael Richardson. (Eh, I like it.)
Antasma- Heath Ledger
Fawful- Rob Paulsen
Elder Princess Shroob- Diane Delano
Dimentio- Alex Beckman (Man on the Internet)
Dark Bowser- Benedict Cumberbatch
Corporal Paraplonk- Ian James Corlett
Private Goomp- Kevin Hart
Sergeant Guy- Lee Tockar
King Boo- Steve Blum
Pom Pom- Andrea Libman
Boom Boom- John DiMaggio
And for those who are returning from the previous story:
King Dedede- Dana Snyder
King K. Rool- Benedict Campbell
King Bob-omb- Gary Schwartz