You question is very vague. Do you mean the plot or the basic concept of playing a Pokemon game?
vulpix is not in Pokemon platinum version.
Yes creselia is is in Pokemon Platinum.
No
no, these Pokemon are unknown in Pokemon platinum
The ID For Pokemon Platinum(USA) CPUE d074d1b3
no you can not.
yes but it is called Pokemon platinum
you can't
You can't, Mewtwo is not available in Platinum.
There is not a verstion of platinum for gba
No
no.