Pokémon Diamond and Pearl/Lake Valor

Lake Valor (Japanese: リッシこ Risshi Lake) is where the legendary Pokémon Azelf lives. It is also where Team Galactic's Battle Commander Saturn is battled for the first time. During the events of Pokémon Diamond and Pearl, Team Galactic used a Galactic Bomb to dry up the lake. The resulting earthquake was felt in Canalave City, which is located on the opposite end of Sinnoh.

Item(s)
Keep going south to pick up a Paralyze Heal
 * TM 25 Thunder