Don't you just beat the elite 4 then get the other 8 badges in the other reigon
If you mean coins, you can only win them in the English soul silver but you can buy them in the Japanese version of soul silver.
win a bug-caching contest
U win
you were probably are at a low level.
You have to win it at the Celadon Game Corner
you win it from the8th gym leader
You battle him and hope you win good luck:)
You need to win the lottory in ss/hg
You have to win the elite 4 30 times
you just cant its in a event in the illex forest
I go to sleep
in soul silver