Jason Marsden

Spunky Spencer (voice)

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)

Raymond “Renny” Marr (voice/uncredited)

Horbert Feist (voice)

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)

Grimp

Antonio (voice) / Young Max Tennyson (voice)

Donny (voice)

Nelson Burkhard

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

Billy Numerous (voice) / Red Star (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)

Kim

Waiter (voice)

Sasuke (voice)

Nermal (voice)

Matt Olsen

Sumo / Brian / Belson (voice)

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

Max Goof (voice)

Kovu (voice)

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

Dash X

Leo (voice)

Young Bruce Wayne (voice)

Shnookums (voice)

(voice) / Mungo (voice)

Garrett Miller (voice)

Kade Burns (voice)

Young Miles Silverberg

Tino Tonitini

Duke (voice)

Peter Pan (voice)

King Louie

Chase Young

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)

Snapper Carr / SCU Officer (voice)

Nermal (voice)

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

Snapper Carr (voice)

Burt Ward

Chester McBadbat / Eliminator #5 (voice)

Box Demon (voice)

Nermal (voice)

Michael (voice)

Nermal / Abnermal (voice)

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)

Chester (voice)

Tommy

Chester McBadbat (voice)

Nermal / Ramone (voice)

Shay Jennings