1985

ThunderCats: Exodus

Snarf (voice)

1977

The Easter Bunny Is Comin' to Town

Chugs / Old Man (voice)

1967

Robin Hoodwinked

King / Poor Man

1982

The Flight of Dragons

Sir Orrin Neville-Smythe (voice)

1976

The Little Drummer Boy Book II

Plato (voice)

1981

The Leprechauns' Christmas Gold

Lord of the Leprechauns (voice)

1966

Gems From Gemini

1981

The Berenstain Bears' Easter Surprise

Boss Bunny

1987

ThunderCats Ho! – The Movie

Lynx-O / Snarf / Slythe / Grune the Destroyer / Ratar-O / Captain Shiner / Topspinner (voice) (as Robert McFadden)

1972

Popeye Meets the Man Who Hated Laughter

Male characters (voice)

1972

Hans Christian Andersen's The Emperor's New Clothes

Jaspar (voice)

1968

Big Game Fishing

Sad Cat

1968

Loops and Swoops

Sad Cat

1965

The Third Musketeer

Sad Cat / Gadmouse / Fenimore / Latimore / Narrator (voice)

1965

Don't Spill the Beans

Sad Cat / Gadmouse / Fenimore / Latimore / Narrator (voice)

1966

Scuba Duba Do

Sad Cat / Gadmouse / Fenimore / Latimore (voice)

1965

Dress Reversal

Sad Cat / Gadmouse / Fenimore / Latimore / Narrator (voice)

1965

Horning In

King Artie (voice)

1985

The Life and Adventures of Santa Claus

Tingler (voice)

1983

The Wind in the Willows

Magistrate (voice)

1967

The Wacky World of Mother Goose

(voice)

1969

Scientific Sideshow

Oscar (voice)

1965

The Invisibeam

1969

Balloon Snatcher

Oscar (voice)

1983

The Coneheads

(voice)

1977

The Fourth King

The beaver (voice)

1980

Pinocchio's Christmas

Cricket (voice)

1979

Rudolph and Frosty's Christmas in July

Donner (voice)

1974

'Twas the Night Before Christmas

Substation Operator / Councilmen / Handyman (voice)

1974

The Year Without a Santa Claus

Jingle Bells (voice)

1980

Gnomes

Kostya, the Russian Gnome (voice)

1966

A Balmy Knight

Sir Blur/Grandpa Dragon (voice)

1964

Adventure By the Sea

Luno / Tim

1963

Trouble in Baghdad

1963

The Missing Genie

1964

Roc-a-Bye Sinbad

1966

Haunted Housecleaning

1968

The Abominable Mountaineers

1967

The Squaw Path

Geronimo/Say-Ah the Medicine Man/Foback/Big Yawn (voice)

1964

King Rounder

1974

Jungle Jack

1973

Who’s Dragon

1972

The Red Baron

Voice

1965

Gadmouse the Apprentice Good Fairy

Sad Cat / Gadmouse / Fenimore / Latimore / Impressario / Narrator (voice)

1972

The Mad, Mad, Mad Monsters

Baron Henry von Frankenstein (voice)

1966

The Defiant Giant

George the Giant

1963

The Sheepish Wolf

Wolf / Sheriff / Sheep (uncredited)

1963

Tell Me a Badtime Story

Nasty / Explorer Ponce de Leon / Captain John Smith

1963

Muggy-Doo Boy Cat

1980

I Go Pogo

Howland Owl / Bothered Bat (voice)

Courageous Cat and Minute Mouse

ThunderCats

Snarf / Slithe (voice)

Cool McCool

Cool McCool (voice)

Linus the Lionhearted

Lovable Truly / Rory Raccoon / So Hi (voice)

SilverHawks

Cmdr. Stargazer / Steel Will / Hardware (voice)

Milton the Monster

Milton the Monster (voice)

The Astronut Show

Astro