A male and female Hippopotas need to be captured to complete a request in Pokémon Legends: Arceus. After Noble Kleavor is defeated and the quest, "Arezu's Predicament," is started, players can speak to Anthe at the clothing shop in Jubilife Village to receive the quest, "Inspiration from Hippopotas." She's interested in studying Hippopotas because of their differences in appearance depending on their gender. Anthe will ask that one male and one female Hippopotas be captured and brought back to her.
Male and female Hippopotas are exact opposites in appearance. The female Hippopotas is brown with yellow nostrils, eyes, and patterns on its back. With male Hippopotas, the brown and yellow colors are reversed, so it's mostly yellow with some brown features. Although these Pokémon can mostly be found in areas with murky waters, it should still be easy to distinguish between the two.
Related: Pokémon Legends: Arceus — Machoke Evolution Guide
After the "Inspiration from Hippopotas" request is accepted, players can head to Crimson Mirelands in Pokémon Legends: Arceus. The two subregions where Hippopotas can be found are Scarlet Bog and Sludge Mound. The Hippopotas, whether male or female, can be spotted in the muddy waters in either subregion. If players are having trouble finding one of the genders in a particular area, they can travel to the other subregion and look there.
Hippopotas are non-hostile, but there will likely be other Pokémon in the area that will attack if they spot the player. There is also an Alpha Hippowdon in Sludge Mound in Crimson Mirelands, so players should bring a strong team with them in case they need to fight. There are usually patches of tall grass for players to crouch and hide in that are in between
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