Pokémon Diamond and Pearl/Oreburgh Mine

'''Oreburgh Mine is where the city gets all of its resources. Roark is in charge of it to make sure that all the Pokémon living in here are safe'''

B1F


This floor is pretty self explanatory and all you need to do is walk around to the other side and go to B2F. It has no trainers, an Onix to catch and an X-Defend or a Poké Ball in Platinum.

Pokémon found

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Items

 * X-Defend(Poké Ball in Platinum) - to the right of the entrance

B2F
There is one worker you can fight right away and he's below the machop and one worker when you go right.

Keep following this path and you will eventually see Roark who you need to talk to so he can go back to the gym.

After Roark leaves keep going left and another worker will want to fight you. When done head back out and go to the Oreburgh Gym to challenge Roark

Trainers

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Pokémon found

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Items

 * Potion - in front of the rock after the second worker
 * Escape Rope - next to the crate after ghe third worker