Suggestions by @fcthemobianfanboy

Mr. Lawrence

as Plankton in Spongebob Squarepants Live Action

Clancy Brown

as Mr. Krabs in Spongebob Squarepants Live Action

Rodger Bumpass

as Squidward Tentacles in Spongebob Squarepants Live Action

Bill Fagerbakke

as Patrick Star in Spongebob Squarepants Live Action

Tom Kenny

as Spongebob Squarepants in Spongebob Squarepants Live Action

Justin Bieber

as Steve in Speedway Junky

Nick Cassavetes

as Director in Speedway Junky

D.L. Hughley

as Jamie Foxx in The Will Smith

Justin Bieber

as Jake in I'll Be Home for Christmas

Jim Carrey

as Batty Koda in Ferngully: The Last Rainforest (live action remake)

Karan Brar

as Leo San Juan in Legend Quest: The Movie

Michael Peña

as Alebrije (voice) in Legend Quest: The Movie

Tim Burton

as Director in Legend Quest: The Movie

John de Lancie

as Discord in Sonic Boom & My Little Pony: Equestria Girls

Cathy Weseluck

as Spike in Sonic Boom & My Little Pony: Equestria Girls

Tabitha St. Germain

as Rarity (voice) in Sonic Boom & My Little Pony: Equestria Girls

Andrea Libman

as Pinkie Pie (voice) in Sonic Boom & My Little Pony: Equestria Girls

Ashleigh Ball

as Rainbow Dash (voice) in Sonic Boom & My Little Pony: Equestria Girls

Tara Strong

as Twilight Sparkle in Sonic Boom & My Little Pony: Equestria Girls

Wally Wingert

as Cubot in Sonic Boom & My Little Pony: Equestria Girls