Suggestions by @fast64

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

Joe Keery

as Diddy Kong in Mario and Sonic

Chris Evans

as Luigi in Mario and Sonic

Emilia Clarke

as Princess Daisy in Mario and Sonic

Anne Hathaway

as Rosalina in Mario and Sonic

Leonardo DiCaprio

as Shadow in Mario and Sonic

Tom Kenny

as Yoshi in Mario and Sonic

Frank Welker

as Yoshi in Mario and Sonic

Frank Dillane

as Yoshi in Mario and Sonic

Tom Holland

as Toad in Mario and Sonic

Seth Rogen

as Donkey Kong in Mario and Sonic