Pokémon Diamond and Pearl/Oreburgh Mine

Items
There are several items scattered throughout the mine, waiting to be picked up. On 1F, there is an X-Defend, and on 2F, an Escape Rope and a Potion can be found.

Instead of getting a X-Defend, in Platinum version you pickup a Poké Ball.

Events

 * 1) Find Roark

The mine is full of wild Pokémon, giving you an excellent place to raise your Pokémon before challenging the Gym. Roark will agree to return to the Gym as soon as you speak with him, but the other miners will insist on battling you.