Ash is not in platinum..
HERE
Nope, you can't see Ash in Pokémon Platinum.
No, you don't battle Ash in Platinum unless you named your rival ash. Other than that, it is impossible.
You don't.
you catch all of his Pokemon and raise them
i think yes
ash,rock,and the girl who has a white hat
Yes. Go to supercheats.com.
Nope. But you can in soul silver or heart gold. (At the top of mount silver)
Ash isn't in that game.
Yes,but you don't battle him in Heartgold and Soulsilver,but you can Battle him in Pearl,Platinum and Diamond.
He does not appear in this game, nor any other game I'm aware of.