Where do you get oaks letter on Pokemon Platinum?

Answer 1

you have to talk to every gym leader after a battle and talk to all of them 32 times and if you have vs them already and didnt talk when you went to them you have to start all over again but if you want your Pokemon you have to call all your Pokemon labby trust me it works because when you wright labby it saves it so you will always have the Pokemon and when you start again and you want the Pokemon you want and called it labby (no capital letters) talk to your partner 5 times in jubilife city and he will give you the Pokemon in turns 1 at a time because everytime your party is full you go to your computer and empty your Pokemon and talk to him until he givs you all the Pokemon and at the end he will say you let me borrow your Pokemon and i gave them all back to you and he gives you a charmander egg and do all your gym leaders again and after every battle talk to them 32 times and when you battled all of them you go back to sandgem town and go in to professor rowans lab and he will say well done for inproving on your sinnoh tour and he will give you the ultimate oaks letter and then fly to route 224 and use oaks letter and you will see the legendary SHAYMIN trust me it works and it is awesome.