There is a path right next to the Pokemon league (In the cave) and if you take it all the way to the end there is a shiny rock and if you have oaks letter you can find oaks there and you talk to him and then a LONG (and i mean take your bike on) path appears and then you go on it and at the end there is an island and you can battle Shaymin (NOT SKY VERSION.)
Or if you have action replay just use the walk through anything cheat and walk on the water to the island. (Use repels you can still run into wild Pokemon while walking on the water.)
you cant get registeele in Pokemon diamond
no
u need oaks letter that's where shaymin is get oaks letter.
take it to the rock up there by the Pokemon league
Via Nintendo Wifi.
No. The Shaymin event (oaks letter) in Pokemon platinum is not shareable. ~Bellafuzz
members card, Oaks letter, Arceus,
No because it does mater
I don't know,but it might be the same question as "where to find a eeve in Pokemon diamod
the sinnoh league champion. defeat her and become the champion.
no you have to get is from an action replay or go to a Pokemon event
you can't, only ruby Pokemon can go to diamod. but diamond Pokemon can't go to ruby