- Acting for Two:
- Maurice La Marche voices Archambault and the owner of the restaurant that praises Shaggy
- Hynden Walch voices Lena and Joan
- Jess Harnell voices the jewelry store guard and the human Scooby in Shaggy's dream
- Jim Meskimen voices Phil Flaxman and the detective
- Jeff Dunham voices Schmatko and the train conductor
- Carlos Ferro voices Oliverio and Sisko
- Casting Gag: This is not the first time Maurice La Marche voices someone involved with the circus .
- Fake Nationality: We have Greg Ellis (British-American) , Hynden Walch (American), and Maurice La Marche (Canadian- American) voicing Romanian characters Marius Brancusi, Lena, and Archambault.
Trivia / Big Top Scooby-Doo!