Scooby-Doo! and Krypto, Too!

Frank Welker Scooby-Doo / Fred Jones (voice)

Grey DeLisle Daphne Blake / Wonder Woman (voice)

Matthew Lillard Shaggy Rogers (voice)

Kate Micucci Velma Dinkley (voice)

P.J. Byrne J.B. (voice)

Victoria Grace Mercy (voice)

Charles Halford Lex Luthor (voice)

Nolan North Computer / Joker / Superman (voice)

Tara Strong Helen / Lois Lane / Harley Quinn (voice)

Fred Tatasciore Solomon Grundy / Perry White (voice)

James Arnold Taylor Jimmy Olsen / Rex Ruthor (voice)

Niccole Thurman Mayor Flemming (voice)