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Homer Simpson / Grampa Simpson (voice)

Homer Simpson (voice)

Homer Simpson (voice)

Homer Simpson / Barney Gumble (voice)

Homer Simpson / Barney Gumble / Sideshow Mel / Happy / Grumpy / Donald Duck / Winnie the Pooh (voice)

Patrick Senior

Needum Taylor

Ted Boseman

Grandpa (voice)

Duke Yipkowski (voice)

Mr. Kenny

Homer Simpson (voice)

Marty

Ray Winters

Peter Oliver

Izzy

Dr. McNally

Walter Diparko

Judge Markway

Jenna

Derry Murbles

Dr. Harvat

Carlson

The Robot Devil (voice)

Dr. Milton Hastings

Homer Simpson / Itchy / Barney / Abe Simpson / Stage Manager / Krusty the Clown / Mayor Quimby / Mayor's Aide / Multi-Eyed Squirrel / Panicky Man / Sideshow Mel / Mr. Teeny / EPA Official / Kissing Cop / Bear / Boy on Phone / NSA Worker / Officer / Santa's Little Helper / Squeaky-Voiced Teen (voice)

Alan Frakesh

Boris / Captain Howdy / Coluans (voice)

Mr. Mysterio / Woodenleg Wally (voice)

Stretch (voice)

Jim Orr

Officer Novarro

Mr. Ramish

Milt

Frank Whitaker

Jeff Bicks

Andrew Preston

Dr. Kinny

Wesker / Scarface (voice)

Scarface (voice)

Mr. Horner / Franklin the Frog (voice)

Dr. Stein

Commissioner Jerry Salerno

Jonathan / Phone Caller / Sailing Instructor (voice)

Thing One / Thing Two (voice)

BoE Agent #2 (voice)

Tiny Werner

Mr. Geminini (voice)

Goon (voice)

Private Cleoutus Dobbs / Baxter (voice)

Officer McBride / Police Officer (voice)

Additional Voices (voice)

Grandpa 'Steely' Phil / Nick Vermicelli (voice)

Eugene Fisher

Minister / Guard (voice)

Kaznian Astronaut / Socialite / Photographer (voice)

Dunkirque (voice)

Guard #1 (voice)

Mr. Jumba (voice)

Slam-bot / Fussy-Boy (voice)

AP-99 (voice)

Robot Sentry 1 / Robot Sentry 2 (voice)

Senator Banda / Garron / Nifty Joe (voice)

Brain Pod #13 (voice)

Mr. Zoop / Alnip (voice)

Hunter #1 / Hunter #2 / Lackey / Casey Kasemish DJ (voice)

Resort Manager / Alien / Captain Alien (voice)

Dave Bishop (voice)

Mr. Bishop (voice)

Walt

Auctioneer / Horse Trader (voice)

Priest (voice)

Homer Simpson (voice)

Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)

Robot Devil (voice)

The Robot Devil (voice)

Guard (voice)

Kobra Commando (voice)

Mr. Groote/Mr. Brooks (voice)

The Postman (voice)

Agent Armstrong

Homer (voice)

Ticket salesman (voice)

Additional Voice Talent (voice)

Boney / Bureauocrates (voice)

Bureauocrates (voice)

Homer / Nectar guy (voice)

Partlow

Joe Spencer

Earl (voice)

Earl / Ice Cream Vendor (voice)

Earl / Bully (voice)

Earl / Lineman / Old Man (voice)

Earl / Principal (voice)

Earl / Cootie Victim (voice)

Earl / Astronaut #1 / Pimply Kid (voice)

Earl / Horse (voice)

Earl / Ed / Thug (voice)

Earl / Show Announcer (voice)

Earl / Kid #2 (voice)

Earl / Janitor #2 (voice)

Earl (voice)

Bumpkin

Bryan

Eddie Day

Grandpa Phil (voice)

Big Arnold (voice)

Nick Vermicelli (voice)

Grandpa Phil / Nick Vermicelli (voice)

Animal Control Officer (voice)

Grandpa Phil / Chicken Man (voice)

Grandpa Phil / Cop #1 (voice)

Delivery Man (voice)

Grandpa Phil / Nolo (voice)

Grandpa Phil / Grandpa Phil's Father / Jolly Olly Man (voice)

Grandpa Phil / Judge (voice)

Grandpa Phil / Reporter (voice)

Dr. Harvey (voice)

Male Fan

Tall Customs Dog / Angel Dog #1 (voice)

Stan

Ralph DaVolio

Earthworm Jim (voice)

Man Test Driving Car

Zoo Keeper

Homer Simpson (voice)

Genie (voice)

Homer Simpson (voice)

Slick Moeller

Genie (voice)

Phil

Self

Homer Simpson (voice)

Brad

Gus the Doorman

Dracula (voice)

Self - Guest

Stewart (voice)

Voodoo Man / Muck Luck (voice)

Narrator (voice)

Lazaar (voice)

Rory O'Grady

Baseball Coach (voice)

Mittens (voice)

Zabar (voice)

Megavolt (voice)

Loudspeaker Announcer (voice)

Mr. Thickly (voice)

Animated Babysitter (voice)

George Wexler

Prince Wudolph (voice)

Dr. Zibaldo (voice)

Jeffries (voice)

Harvey (voice)

Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)

Diane's Teacher (uncredited)

Man in Chair

Maitre D'

Pete

Funeral Director

David Champion / Homer Simpson

Steve Michaels

Brian