Underground is actually quite fun.
Here are a few things that you can do underground.
1.you get to make your own secret base
2.You get to put stuff in your base
3.You get to dig up gems and the bigger the gems are the better Items you can get for your secret base.
4.If you get some friends to go underground with you, you can play capture the flag with them by going in their base and taking their flag, and the more flags you obtaine, the better your flag gets.
5.sometimes if you are lucky, you may dig up a fossil or a reveive or something like that.
6.If you get a fossil, you can get it turned back into a Pokemon, (Cranidos for Pokemon diamond, Sheildon for Pokemon pearl)
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That is really all I can think of right now...I think I got them all...Even if I didn't though,
What I did say should have helped either way. I hope it did.
in the undergroud tunnel
Pokemon diamond
Pokemon diamond Pokemon diamond Pokemon diamond
if you wan to get it,you have to ever trade,or you can go into the undergroud and find the dome fossil after you get the natilorl dex
you cant be a Pokemon in Pokemon diamond
She is not in Pokemon diamond.
There is no Pokemon temple! There is such thing as Pokemon diamond.
Pokemon 134 is Finneon in diamond
Chingling is the 47th Pokemon in Pokemon Diamond.
where are special key in Pokemon diamond where are special key in Pokemon diamond
You can not get dark Pokemon on Pokemon diamond and pearl
In the Pokemon diamond underground.