It allows you to catch shaman on the route beside the Pokemon league at the end of the route there will be a big rock and oak will unlock the rock and let you get shaman
you use a action replay and use it to get oaks letter
get the oaks letter cheat on the action replay and talk to the guy in the pokemart
u can put a cheat on ur action replay for oaks letter
You get oaks letter from a special event that is on the internet or wifi. you get it from any poke-mart in sinnoh
u need oaks letter that's where shaymin is get oaks letter.
that was an event to get shaymin! i dont think you can get it the only way to get oaks letter is from an AR code
Nintendo event or AR
you get it with a Nintendo event
no
Event or cheat
impossible
go to a Nintendo event.