Suggestions by @fast64

James Gunn

as Producer in Mario and Sonic

Hans Zimmer

as Composer in Mario and Sonic

Donald Glover

as Vector in Mario and Sonic

Lee Majdoub

as Agent Stone in Mario and Sonic

Tika Sumpter

as Maddie in Mario and Sonic

James Marsden

as Tom in Mario and Sonic

Tom Kenny

as Kamek in Mario and Sonic

Freddie Highmore

as Professor E. Gadd in Mario and Sonic

Gal Gadot

as Rogue in Mario and Sonic

Tim Burton

as King Boo in Mario and Sonic

Awkwafina

as Toadette in Mario and Sonic

Idris Elba

as Knuckles in Mario and Sonic

Will Smith

as Shadow in Mario and Sonic

Leonardo DiCaprio

as Espio in Mario and Sonic

Snoop Dogg

as Vector in Mario and Sonic

Gaten Matarazzo

as Charmy in Mario and Sonic

Paul Bettany

as Metal Sonic in Mario and Sonic

Thomas Brodie-Sangster

as Silver in Mario and Sonic

Harry Styles

as Silver in Mario and Sonic

Archie Yates

as Bowser Jr. in Mario and Sonic