Ash, Dawn and Brock discover a lost Hippopotas and set off to return it to its herd. However, they have to fend off Team Rocket's attacks and the Hippopotas' sleep-inducing ability to succeed in their quest.
| Creator | N/A |
|---|---|
| Actor | Rica Matsumoto, Ikue Otani, Daiki Yamashita |
| Country | Japan |
| Production | Shogakukan Production |