Sapphire Sea

Sapphire Sea is a dungeon in Aurora region, located in Fantasy Bay. This dungeon rewards the players the HM Surf at the end. The dungeon is found far north of Florea Town and you also can get to it by using Surf at the southeastern point of Borealis City.

The dungeon is full of Water-type Pokémon so it's good to train Pokémon that are strong against Water-type.