Lou Scheimer

Bearded sailor / pirate (voice) (uncredited)

King Randor / Swift-Wind / Kowl / Mantenna / Horde Trooper / Kobra Khan / Trap Jaw / Tri-Klops / Broom / Sprag / Sprocker / Garv the Innkeeper / Bard / Messenger / Horde Computer (voice)

Mighty Mouse (voice)

Orko / Trap Jaw / Attak Trak / King Randor / King Paw / Royal Guard / Uncle Montork (voice)

Self

Orko

Orko / King Randor / Stratos / Mekaneck / Man-E-Faces (voice)

Dumb Donald

Spirit / Swift Wind / Light Hope / Broom / Kowl / Sprag / Sprocker / Leech / Grizzlor / Modulok / Multi-Bot / Horde Troopers / Horde Prime / Colonel Blast

Doc Clayton / Barker / Hawgtie / Howler

Tracy the Gorilla / Anabone / Skelevision / Fuddy / Fib Face / Sir Trance-A-Lot

A.W.O.L.

Romulan Crewman (voice) (uncredited)

Lemus / Aquan Harvester (voice) (uncredited)

Demos / Dramian Guard (voice) (uncredited)

Gremlin (voice)

Mighty Mouse (voice)

Olympian Computer/Vizier/Other (voice)

Tom (voice) / Jerry (voice) / Droopy (voice)

Snubby the Monkey (voice) (uncredited)

Bat-Mite (voice)