Suggestions by @aaronpirela

Jameela Jamil

as Pandora Pitstop in Wacky Races

Marc Evan Jackson

as Sylvester Sneezly in Wacky Races

Markipliar

as The Announcer in Wacky Races

Jim Conroy

as Blubber Bear in Wacky Races

Woody Harrelson

as Lazy Luke in Wacky Races

Trey Parker and Matt Stone

as The Slag Brothers in Wacky Races

Seth Rogen & Evan Goldberg

as Sergeant Blast & Private Meekley in Wacky Races

Nancy Cartwright

as Sawtooth in Wacky Races

Kevin James

as Rufus Ruffcut in Wacky Races

Brian Hull

as The Ant Hill Mob in Wacky Races

Derek Mears

as Tiny "Big" Gruesome in Wacky Races

Jennifer Tilly

as Bela "Little" Gruesome in Wacky Races

Florian Munteanu

as Red Max in Wacky Races

Florian Bartholomäi

as Red Max in Wacky Races

Tony Hale

as Professor Pat Pending in Wacky Races

Richard Madden

as Peter Perfect in Wacky Races

Tatiana Maslany

as Penelope Pitstop in Wacky Races

Billy West

as Muttley in Wacky Races

Jason Isaacs

as Dick Dastardly in Wacky Races

BD Wong

as Dr. Zin in The Falcon Force