Peter Potamus

Peter Potamus is a purple animated hippopotamus that first appeared in the 1964–1966 animated television series The Peter Potamus Show, produced by Hanna-Barbera and first broadcast on September 16, 1964.
"The Peter Potamus Show" was divided into three segments: "Peter Potamus and So-So", "Breezly and Sneezly" and "Yippee, Yappee and Yahooey". "Peter Potamus" was a companion series to "The Magilla Gorilla Show" and both series premiered in first-run syndication before being picked up by ABC in January 1966. At that time, the "Breezly and Sneezly" segment was swapped with "Ricochet Rabbit & Droop-a-Long", a segment on "The Magilla Gorilla Show". After the ABC run ended in 1967, cartoons from "Magilla Gorilla" and "Peter Potamus" shows were syndicated together.
The Ideal toy company was the sponsor of the television series, and during the original run of the cartoon, the closing song ended with the phrase: "And there he goes Peter Potamus, our ideal". A similarly subtle sponsor reference appeared in the "Magilla Gorilla" theme song lyrics: "He's really ideal".
The original "Peter Potamus" series used to be seen on the cable TV channel Boomerang, often as part of its anthology series "Boomerang Zoo".
Early promotional materials for the series carried the title "Peter Potamus and His Magic Flying Balloon", but that title never appeared on screen.
Segments.
Peter Potamus and So-So.
The main segment featured Peter Potamus (voiced by Daws Butler impersonating Joe E. Brown; Butler used an identical voice for Lippy the Lion) and his diminutive sidekick So-So the monkey (voiced by Don Messick). Peter is big, purple, and friendly, dressed in a safari jacket and hat. Episodes generally consisted of Peter and So-So exploring the world in his hot air balloon, which was capable of time travel at the spin of a dial. When faced with a precarious situation, Peter uses his Hippo Hurricane Holler to blow away his opponents.
Breezly and Sneezly.
A polar bear named Breezly Bruin (voiced by Howard Morris) and his friend Sneezly the Seal (voiced by Mel Blanc) use various schemes to break into an army camp in the frozen north, while trying to stay one step ahead of the camp's leader Colonel Fuzzby (voiced by John Stephenson).
Yippee, Yappee and Yahooey.
Three dogs named Yippee (voiced by Doug Young), Yappee (voiced by Hal Smith), and Yahooey (voiced by Daws Butler impersonating Jerry Lewis) aka The Goofy Guards, work for the King (voiced by Hal Smith), a short, complaining ruler who is often on the receiving end of their antics. The trio's plumed hats and swords are reminiscent of The Three Musketeers.
Home media.
The episode "Fe Fi Fo Fun" is available on the DVD "Saturday Morning Cartoons 1960s Vol. 1". The episode "Wagon Train Strain" is available on the "Saturday Morning Cartoons 1960's Vol. 2" set. The episode "Cleo Trio" is on the "Hanna Barbera 25 Cartoon Collection" DVD, part of "The Best of Warner Bros." series.
On November 1, 2016, Warner Archive released "The Peter Potamus Show- The Complete Series" on DVD in region 1 as part of their Hanna–Barbera Classics Collection. This is a Manufacture-on-Demand (MOD) release, available exclusively through Warner's online store and Amazon.com.