get oak's letter from a event. i recommend getting wifi so u can get that shaymin from mystery gift.
The event scene in Pokemon Pearl where the player meets Professor Oak on route 224 is part of a Nintendo-sponsored special event in order to obtain the legendary Pokemon, Shaymin. The player must be involved in the special event to obtain the key item called Oak's Letter, and afterwards Professor Oak will appear on route 224.
What to do after you talk to prof oak about groudon
Shaymin is at the top of route 224. You need Oak's Letter. After you beat the Pokemon League, go to route 224 with Oak's Letter and talk to him. He will show you the stone tablet and ask you whom you give your thanks to. When you tell him, the ground will change and there will be flowers everywhere. There will be a narrow path up ahead. Then shaymin will appear. Shaymin will look at you, then it will run away. Go down the Seakbreak Path to find Shaymin. (use your bike) Shaymin is located at the Flower Paridise.
Get Oak's letter and run across Seabreak path until you are in Flower Paradise and talk to Shaymin battle and Catch it if you like.
Only from event
you have to do prof. oak in bed then he gives you the Oak mail you have to battle prof. oak then he gives you the Oak mail
Depending what you need if you need shaymin get a the letter prof. oak at a Nintendo event. But i have no clue. Sorry Wooooooooooooop
Oak's Letter.
You get Oak's letter then go to the weird rock by Victory Road. Oak will be there and Shaymin will appear.
You need Oak's letter!
Through normal game play, you cannot get shaymin without Oak's Letter. Though, you can use an Action Replay (a cheating device) and enter a code to get Oak's Letter to get shaymin. Yo im inproving this answer by saying yo idk y i did this hehe
Other person's answer: get oaks letter and go to the tablet oak will be there and shaymin will appear My answer ;In order to get the lengendary grass pokemon: Shaymin, you must first receive Oak's letter or invitation to tell you to go to the lab from Twinleaf Town. After, Shaymin will appear.
you go to route 224 and go to where the stone that is shiny, you face it and click a then prof. Oak will arrive and the island that leads to shaymin will show up. hope this helps =]
You need mystery gift to get Oak's Letter. and you need to be able to get to Route 224. You need to go to a large rock and press A. Then Prof. Oak will come and say stuff and Shaymin will appear. It will run away, and you have to run through the Flower Paradise after Shaymin. BIG TIP: BRING A LOT OF ULTRA, GREAT, AND TIMER BALLS WITH U!! Shaymin is ranked 45 in the catch rate. After a while, u will go up a hill and SHaymin will be there. Hope this has Helped. ;)
Oak's Letter is obtainable through going to one of the events. You can also get it through hacks.
Oak's letter is in diamond, pearl and platinum and it doesn't give you jirachi it gives you shaymin.