Suggestions by @bumbleprime

Dee Bradley Baker

as Astrotrain in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Dan Castellaneta

as Octane in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Jess Harnell

as Barricade in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Frank Welker

as Soundwave in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Steve Blum

as Starscream in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Frank Welker

as Megatron in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Mark Hamill

as Wheeljack in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Jeff Bennett

as Prowl in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Kevin Michael Richardson

as Bulkhead in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Khary Payton

as Jazz in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Corey Burton

as Ratchet in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

David Kaye

as Cliffjumper in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Jodi Benson

as Arcee in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Patrick Warburton

as Ironhide in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Josh Keaton

as Bumblebee in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Peter Cullen

as Optimus Prime in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Sean Hayes

as Mac Smith in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Ned Beatty

as Richard Ferrell (Stationmaster) in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Steve Martin

as Joe Lewis ( The Conductor) in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)

Frank Welker

as Scooby-Doo in Scooby-Doo! Meets The Transformers (Chugga-Chugga Boo Boo!)