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.
You cannot find Lugia in Pokémon Platinum.
You can't find Vibrava on Pokémon Platinum