Jason Marsden

Spunky Spencer (voice)

Raymond “Renny” Marr (voice/uncredited)

Snapper Carr (voice) / Snapper Carr / Bystander (voice) / Snapper Carr / Kid (voice) / Snapper Carr / SCU Officer (voice) / Snapper Carr / Soldier (voice) / Snapper Carr / Thanagarian Soldier (voice)

Horbert Feist (voice)

Grimp

Bart Allen (voice) / Bart Allen / Impulse (voice) / Bart Allen / Kid Flash (voice) / Bart Allen / Lok-Ron (voice) / Impulse (voice) / Impulse / Atom (voice) / Impulse / Kid Flash / Atom (voice) / Impulse / Lead Singer (voice) / Impulse / Ray Palmer (voice) / Kid Flash (voice) / Kid Flash / Danny Chase (voice) / Kid Flash / Thomas Tompkins (voice)

Antonio (voice) / Young Max Tennyson (voice)

Donny (voice)

Nelson Burkhard

Billy Numerous (voice) / Red Star (voice)

Felix Renton (voice) / Ryan (voice) / Shark Kid (voice) / Sportscaster (voice)

Rich Halke

Boy #1 / Boy #2 (voice) / Firefly (voice)

GPS / Babysitter / Hack Smashnikov (voice) / Manager / Funso / Host (voice)

Owen (voice) / Teenage Clark Kent (voice) / Young Clark Kent (voice)

Sasuke (voice)

Waiter (voice)

Kim

Nermal (voice)

Sumo / Brian / Belson (voice)

Matt Olsen

Paco (voice) / Scooby-Doo Robin (voice) / Speedy (voice)

Kovu (voice)

Max Goof (voice)

Richie Foley (voice) / Richie Foley / Gear (voice)

Dash X

Shnookums (voice)

Young Bruce Wayne (voice)

Garrett Miller (voice)

Leo (voice)

(voice) / Mungo (voice)

Kade Burns (voice)

Tino Tonitini

Duke (voice)

Peter Pan (voice)

King Louie

Chase Young

Young Miles Silverberg

Gregory Morgan

Cavin (voice)

Jack (voice)

Additional Voices (voice)

Additional Voices (voice)

Kovu (voice)

Max (voice)

Max (voice)

Cyrus

Dick Grayson / Young Bruce Wayne (voice)

Max Goof (voice)

Nermal (voice)

Snapper Carr (voice)

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

Burt Ward

Snapper Carr (voice)

Chester McBadbat / Eliminator #5 (voice)

Box Demon (voice)

Snapper Carr (voice)

Nermal / Abnermal (voice)

Nermal (voice)

Michael (voice)

Chester (voice)

Tommy

Chester McBadbat (voice)

Nermal / Ramone (voice)

Shay Jennings

Sydmull

Bill Dooley

(Voice)

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

Buddy (Age 15)

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

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

Corki

Boy

Kenny

Young Man / Bartender (voice)

Eric Moeberg

Chester McBadbat (voice)

Suicide Jack

Tasslehoff Burrfoot (voice)

Bug

Nurse Crackers / Devored Animals (voice)