- End of an Age: This film serves as the final production from Hanna-Barbera before the company officially folded into Warner Bros Animation (even though WBA handled the bulk of the production by this time); as well as the final production credit for William Hanna before his death in 2001.
- Fan Nickname: The Phantom Virus has recently received the nickname of the Spindly Johnny.
- In Memoriam: The credits end with a dedication to William Hanna.
- The Other Darrin: Due to Mary Kay Bergman's death in 1999, Grey DeLisle voices Daphne for the first time and in a few years would become the characters official voice, incumbent as of 2019.
- Relationship Voice Actor: Officer Wembley and Eric Kaufman are Daffy and Porky . Notably, this is the only Scooby project they've been in.
Trivia / Scooby-Doo and the Cyber Chase