Suggestions by @bumbleprime

Peter Cullen

as Optimus Prime in Scooby-Doo! Meets The Transformers (The Need For Speed)

John DiMaggio

as The Speed Demon in Scooby-Doo! Meets The Transformers (The Need For Speed)

Albert Brooks

as Myles Valent in Scooby-Doo! Meets The Transformers (The Need For Speed)

Ed Helms

as Bob Jordan in Scooby-Doo! Meets The Transformers (The Need For Speed)

Sean Connery

as George Hamilton in Scooby-Doo! Meets The Transformers (The Need For Speed)

Casey Affleck

as Jack Richardson in Scooby-Doo! Meets The Transformers (The Need For Speed)

Frank Welker

as Scooby-Doo in Scooby-Doo! Meets The Transformers (The Need For Speed)

Mindy Cohn

as Velma Dinkley in Scooby-Doo! Meets The Transformers (The Need For Speed)

Matthew Lillard

as Shaggy Rogers in Scooby-Doo! Meets The Transformers (The Need For Speed)

Grey DeLisle

as Daphne Blake in Scooby-Doo! Meets The Transformers (The Need For Speed)

Frank Welker

as Fred Jones in Scooby-Doo! Meets The Transformers (The Need For Speed)

Patrick Warburton

as Ironhide in Transformers: The Telltale Series

Kevin Hart

as Jazz in Transformers X G.I. Joe: Assemble

Emma Stone

as Arcee in Transformers X G.I. Joe: Assemble

Alan Ritchson

as Ironhide in Transformers X G.I. Joe: Assemble

Keith David

as Future Voice Actors Of Shockwave in Future Voice Actors Of Shockwave

Frank Welker

as Soundwave in Transformers Zombies War

Tara Strong

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

Jim Cummings

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

Tom Kenny

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