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S10:E44 - Mass Hip-po-sis!

Mass Hip-po-sis!

S10:E44
2007
5/10
IMDb

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.

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