Peter Potamus, Time Traveler is an animated film produced by Warner Animation Group and based on the Hanna-Barbera character Peter Potamus. It is the fourth film in the second phase of the Warner Bros. Hanna-Barberaverse and the fourteenth film overall.
Peter Potamus is a hippo who discovers that his father had a magical time-traveling balloon. So, Peter and his monkey friend So-So use it to travel into World War I. However, it doesn't take long before they catch the attention of a corrupt pilot named Dread Baron and his dog sidekick Mumbly. They must find a way to travel back to the present.
- Chris Edgerly as Peter Potamus
- TBD as So-So
- TBD as Dread Baron
- Frank Welker as Mumbly
- TBD as Colonel Fusby
- TBD as Touché Turtle
- TBD as Dum Dum
- TBD as Yippee
- TBD as Yappee
- TBD as Yahooeey
- Dread Baron and Mumbly are from Scooby Doo's All-Stars Laff-A-Lympics.
- In the film, it is revealed that Dread Baron and Mumbly are ancestors of Dick Dastardly and Muttley respectively. This was not the case in Scooby-Doo's All Stars Laff-A-Lympics, as Dick Dastardly and Dread Baron were brothers.
- Peter Potamus and So-So meet a few different Hanna-Barbera characters as they time travel.