Characters played by Frank Welker
Scooby-Doo
Fred Jones
Characters played by Grey Griffin
Daphne Blake
Black Canary
Characters played by Matthew Lillard
Norville 'Shaggy' Rogers
Characters played by Diedrich Bader
Batman
Characters played by Kate Micucci
Velma Dinkley
Characters played by Jeff Bennett
The Joker
Arkham Security Guard
Characters played by Jeffrey Combs
The Question
Professor Scarlett
Characters played by John DiMaggio
Aquaman
Mr. Freeze
Crimson Cloak
Characters played by Nika Futterman
Catwoman
Characters played by Nicholas Guest
Martian Manhunter
Characters played by John Michael Higgins
The Riddler
Characters played by Tom Kenny
Penguin
Plastic Man
Characters played by Kevin Michael Richardson
Clayface
Detective Chimp
Male News Reporter
Characters played by Tara Strong
Harley Quinn
Poison Ivy
Female GNN News Reporter
Characters played by Fred Tatasciore
Harvey Bullock
Killer Croc
Bane
Blockbuster
Characters played by Sam Riegel
Dr. Achilles Milo
Leo Scarlett