Frank Welker Fred Jones, Scooby-Doo Voice Grey DeLisle Daphne Blake Voice Matthew Lillard Shaggy Rogers Voice Kate Micucci Velma Dinkley Voice John DiMaggio Voice Kimberly Brooks Voice Chris Paul Himself Guest Voice Wanda Sykes Herself Guest Voice Kenan Thompson Himself Guest Voice Phil LaMarr Voice Mark Hamill Voice Kevin Michael Richardson Voice Kari Wahlgren Voice Dee Bradley Baker Voice Jess Harnell Voice Darci Lynne Farmer Darci Lynne Farmer , Petunia Voice Keith Ferguson Voice Ian James Corlett Voice Stephen Stanton Voice Christian Slater Voice Mike Milo Director Frank Paur Director Sean Bishop Director Gavin Dell Director Chris Bailey Director, Producer Jae Kim Director Michael Ryan Writer Caroline Farah Writer Thomas Krajewski Writer Analisa LaBianco Writer Mark Hoffmeier Writer Benjamin Townsend Writer Sam Register Executive Producer Jeffery Spencer Writer