The Same You Do on Pokemon Diamond and pearl You Go to Some Poke centre and talk to everyone until you see this person that gives you the clothes there are ice trainer,Lol i dont know much of em ik there is a school kid too i choosed ice trainer cuz he rockz:D
-Starwest
Go to the Violet City Pokecenter and talk to the boy on the second floor. He will ask how others see you and from there you can choose.
~Banshee0213
Chat with our AI personalities
To change your appearance in Pokemon Platinum's Union Room you need to talk to an NPC in the Oreburgh Pokemon Center. The NPC in question has the appearance of a Psychic trainer.
Union Cave
You find it in Union Cave.
walk?? look around!!
It is upstairs of the Pokemon center the first person to your left