Shaggy is selected to participate in the World Invitational Games in London, England.
| Actor | Role |
|---|---|
 Frank WelkerFreddie Jones / Scooby-Doo (voice) | Freddie Jones / Scooby-Doo (voice) |
 Mindy CohnVelma Dinkley (voice) | Velma Dinkley (voice) |
 Grey DeLisleDaphne Blake (voice) | Daphne Blake (voice) |
 Matthew LillardShaggy Rogers (voice) | Shaggy Rogers (voice) |
 Robin Atkin DownesFortius / Announcer (voice) | Fortius / Announcer (voice) |
 Troy BakerSergey Plotnikov (voice) | Sergey Plotnikov (voice) |
 Josh KeatonSteve Looker (voice) | Steve Looker (voice) |
 Janet MontgomeryDiane (voice) | Diane (voice) |
 James Patrick StuartJack Riggins / Igor (voice) | Jack Riggins / Igor (voice) |
 Domitilla D'AmicoDaphne Blake (uncredited) | Daphne Blake (uncredited) |