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)

Seth Green

Dan Milano

Superman / Bizarro (voice)

Breckin Meyer

Chad Morgan

Green Lantern / Black Adam (voice)

Nathan Fillion

Wonder Woman (voice)

Alex Borstein

Two-Face

Neil Patrick Harris

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

Matthew Senreich

Lex Luthor / Green Arrow (voice)

Alfred Molina

Superboy / Brainiac (voice)

Zac Efron

Lena Luthor (voice)

Sarah Hyland

Lois Lane

Megan Fox

Gorilla Grodd (voice)

Clancy Brown

The Riddler / Sunbather (voice)

Paul Reubens

Guest Voice

Clare Grant

Guest Voice

Tara Strong

The Joker / Two-Face (voice)

Giovanni Ribisi

Narrator / Starro / Captain Cold (voice)

Kevin Shinick

Sinestro / Swamp Thing / Captain Cold (voice)

Zeb Wells

Martian Manhunter / Seahorse Leader (voice)

Hugh Davidson