Scooby-Doo! and Krypto, Too!

Frank Welker as Scooby-Doo / Fred Jones (voice) Matthew Lillard as Shaggy Rogers (voice) P.J. Byrne as J.B. (voice) Victoria Grace as Mercy (voice) Charles Halford as Lex Luthor (voice) Nolan North as Computer / Joker / Superman (voice) Tara Strong as Helen / Lois Lane / Harley Quinn (voice) Grey DeLisle-Griffin as Daphne Blake / Wonder Woman (voice) Kate Micucci as Velma Dinkley (voice) Fred Tatasciore as Solomon Grundy / Perry White (voice) James Arnold Taylor as Jimmy Olsen / Rex Ruthor (voice) Niccole Thurman as Mayor Flemming (voice)

Jerry Siegel Characters Bob Kane Characters Jerry Robinson Characters Cecilia Aranovich Director Bill Finger Characters Bruce Timm Characters Sam Register Executive Producer William Moulton Marston Characters Paul Dini Characters Joe Shuster Characters Rick Morales Producer Robert J. Kral Original Music Composer