Actually, you can. You must have either a router or a Nintendo Wi-Fi Connector that you can get at a local game store. You can find a Mystery Gift when there is a certain event in New York.
When you use Mystery Gift in Diamond, Pearl or Platinum, you can only get 1 Mystery Gift at a time and that's only if Nintendo is holding the event. Nintendo can only have 1 Wi-Fi event at a single time.
Mystery Gift: MANAPHY Egg ---- Mystery Gift: Azure Flute ---- Mystery Gift: Member Card ---- Mystery Gift: Oak's Letter ----
get oak's letter from a event. i recommend getting wifi so u can get that shaymin from mystery gift.
The only way to get Oak's Letter as a Mystery Gift was to wait for an event, go to that event, and then download it as a mystery gift. However, the event to get Shaymin in America for Diamond and Pearl has already passed, so it is impossible to get it as a mystery gift now. There has already been a Pokemon Event for Shaymin (what you need Oak's Letter for) for Pokemon Platinum, so that has passed, too.
to get professer oaks letter then you must first have the mystery gift from Jubilife city.You must also have the national pokedex. Save your progress.Then turn your Nintendo ds on and select mystery gift.Then you must select via wi-fi connection and choose oaks letter. then you must play Pokemon diamond and go to any poke-mart and talk to the man in green and he will give you oaks letter. ----------------------------------------------------------------------------------------------------------------- Can u do it any time, or do u have to do it by a certain time?
going to the question "how do you get oak's letter in Pokemon diamond" to see the jokker and say to it if I kill it
oaks letter
You need to receive a Challenge Letter from it.
You have to get oak's letter at on a special event.
Via Nintendo Wifi.
There is a road behind the Pokemon league where Shaymin can be found if you get Oak's letter.
the three Pokemon are arceus darkrai and shaymin.you can get the item (i.e: oak's letter) via ar, Nintendo event or mystery gift.