Jason Marsden

as Dom Fletcher

as Viktor

as N.E.W.T. (voice)

as Max Goof (voice)

as Terry Blake

as Gormon / Reporter 1 (voice)

as Gorman (voice)

as Self

as Cyrus

as Box Demon (voice)

as Dick Grayson / Young Bruce Wayne (voice)

as Gus

as Ricky Tocaro

as GPS / Babysitter / Hack Smashnikov (voice)

as Manager / Funso / Host (voice)

as Additional Voices (voice)

as Kovu (voice)

as Sydmull

as Sydmull (voice)

as Sydmull

as Sumo / Brian / Belson (voice)

as Suicide Jack

as Self

as Young Bruce Wayne (voice)

as Additional Voices (voice)

as Nermal (voice)

as Sumo / Brian / Belson (voice)

as The Flish (voice)

as Sinestropotamus (voice)

as Mr. Mxyzchkn (voice)

as Nurse Crackers / Devored Animals (voice)

as Eddie Munster (archive footage)

as The Atom (voice)

as Soldier (voice)

as Caellich (voice)

as Doctor Ivo (voice)

as Spirit Aye-Aye (voice)

as Huan (voice)

as Kenny

as The Flish (voice)

as Kade Burns (voice)

as Chester (voice)

as Adventurer

as Leo (voice)

as Professor Baldini

as Bart Allen / Impulse (voice)

as Bart Allen (voice)

as Impulse / Ray Palmer (voice)

as Impulse (voice)

as Impulse / Atom (voice)

as Impulse / Lead Singer (voice)

as Impulse / Kid Flash / Atom (voice)

as Kid Flash (voice)

as Bart Allen / Kid Flash (voice)

as Bart Allen / Lok-Ron (voice)

as Kid Flash / Thomas Tompkins (voice)

as Kid Flash / Danny Chase (voice)

as Duke (voice)

as Young Man / Bartender (segment "Jonah Hex") (voice)

as Young Man / Bartender (voice)

as Horbert Feist (voice)

as Antonio (voice)

as Young Max Tennyson (voice)

as Nermal (voice)

as Professor Bonkers (voice)

as Nermal / Abnermal (voice)

as Chester McBadbat / Eliminator #5 (voice)

as Speedy (voice)

as Paco (voice)

as Scooby-Doo Robin (voice)

as Nermal / Ramone (voice)

as Eric Moeberg

as Thomas Wayne / Cop / Doctor / Youth 2 (voice)

as Nermal (voice)

as Tasslehoff Burrfoot (voice)

as (voice)

as Kelso Sutton

as Chester McBadbat (voice)

as Chester McBadbat / Aladdin Guy / Guard #2 (voice)

as Wendell

as Convenience Store Clerk

as Danger Duck (voice)

as Matt Olsen

as Max Goof (voice)

as Professor (voice)

as Firefly (voice)

as Boy #1 / Boy #2 (voice)

as Snapper Carr (voice)

as Chester McBadbat (voice)

as Chester McBadbat / Clint / Jeff / Johnny Hunt / Shaggy (voice)

as Chase Young (voice)

as Waiter (voice)

as Snapper Carr (voice)

as Billy Numerous (voice)

as Red Star (voice)

as Chester (voice)

as Himself - Host

as Burt Ward

as Numbuh 80 (voice)

as Rikochet (voice)

as Shark Kid (voice)

as Felix Renton (voice)

as Ryan (voice)

as Sportscaster (voice)

as Snapper Carr / SCU Officer (voice)

as Snapper Carr / Soldier (voice)

as Snapper Carr (voice)

as Snapper Carr / Bystander (voice)

as Snapper Carr / Kid (voice)

as Snapper Carr / Thanagarian Soldier (voice)

as Snapper Carr (voice)

as Bug

as (voice)

as Mungo (voice)

as Chester McBadbat (voice)

as Guy #1 / Monster (voice)

as Max (voice)

as Max Goof

as Flash Flemming (voice)

as Richie Foley / Gear (voice)

as Richie Foley (voice)

as Norman Squirelli

as Max (voice)

as Tino Tonitini

as Jack (voice)

as Additional Voices (voice)

as Donny (voice)

as Kovu (voice)

as Kim

as Josh

as Prep School Guy (voice)

as Daniel

as Garrett Miller (voice)

as Tony Zitelli

as (Voice)

as King Louie

as Cal

as Teenage Clark Kent (voice)

as Teenage Clark Kent (voice)

as Young Clark Kent (voice)

as Owen (voice)

as Chet

as Student #3 (voice)

as Shay Jennings

as Max (voice)

as Bill Dooley

as Self

as Kevin (voice)

as Shnookums

as Jason Marsden

as Dirk (voice)

as Shnookums (voice)

as Jason Barkley

as Thackery Binx (voice)

as Sam

as Gregory Morgan

as Grimp

as Buddy (Age 15)

as Spunky Spencer (voice)

as Gregory Morgan

as Rich Halke

as Dash X

as Boy

as Tommy

as Peter Pan (voice)

as Michael (voice)

as Jess

as Young Miles Silverberg

as Eddie Munster

as Raymond “Renny” Marr (voice/uncredited)

as Nelson Burkhard

as Cavin

as Cavin (voice)