The Underground Flag Stealing
This hint is for those who has a freind who has Pokemon Diamond or Pearl, first, go underground, second, find your buddys secret base, third, steal there flag and go to your secret base while your freind is doing the same, fourth, submit the flag and do it all over again, you may do this multiple times until you are a platinum rank and removed all the boulders, good flag hunting!
More tricks, tips and cheats for this game are right here - Pokemon Diamond cheats
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