Nelson Shin Director, Producer Peter Cullen Optimus Prime, Ironhide Voice Michael Bell Prowl, Scrapper, Swoop, Junkion Voice Corey Burton Spike Witwicky, Brawn, Shockwave Voice Eric Idle Wreck-Gar Voice Casey Kasem Cliffjumper Voice Judd Nelson Hot Rod, Rodimus Prime Voice Leonard Nimoy Galvatron Voice Neil Ross Bonecrusher, Hook, Springer, Slag Voice Robert Stack Ultra Magnus Voice Frank Welker Megatron, Soundwave, Rumble, Frenzy, Laserbeak, Ravage, Wheelie, Auto-combatant, Junkion Voice Orson Welles Unicron Voice Ron Friedman Screenwriter Joe Bacal Producer Tom Griffin Producer Lee Gunther Executive Producer Margaret Loesch Executive Producer Vince DiCola Original Music David Hankins Film Editing Carol Dudley Casting