Lake Acuity

19 Pokémon can be caught at Lake Acuity in Sinnoh — highlighted on the map below.

One of Sinnoh's great lakes, Lake Acuity also appears within the Alabaster Icelands of the old Hisui region. Acuity Cavern sits at its center and shelters Uxie, the Legendary Being of Knowledge and the lake's guardian. According to Volo, the lake mysteriously holds seawater, though whether geography or a Pokémon is responsible remains unknown. During the main story of the Sinnoh games, Team Galactic's Jupiter seizes the resident Legendary Pokémon here.