Seth Green

as The Nerd / Batman / Robin / Scarecrow / Darkseid / Ace the Bathound / Toyman / Dr. Fate / Jimmy Olsen / Black Manta / Aquaman / Clayface / The Penguin / Killer Croc / Cyborg / Banehound / Various (voice)

Breckin Meyer

as Superman / Bizarro (voice)

Nathan Fillion

as Green Lantern / Black Adam (voice)

Alex Borstein

as Wonder Woman (voice)

Matthew Senreich

as The Flash / Reverse-Flash / Weather Wizard / Waiter (voice)

Alfred Molina

as Lex Luthor / Green Arrow (voice)

Zac Efron

as Superboy / Brainiac (voice)

Sarah Hyland

as Lena Luthor (voice)