From Bulbapedia, the community-driven Pokémon encyclopedia.
(Japanese: シンジこ Shinji Lake
) is a location in Sinnoh
The player and his or her rival come here after watching reports of a red Gyarados on television in hopes of seeing something similarly amazing, early in the story of Pokémon Diamond and Pearl. This is also where players will recieve their first Pokémon in Sinnoh after being attacked by a Starly. It is also where the legendary Pokémon, Mesprit lives.