go to a website called VIZZED and search Pokemon read
Chat with our AI personalities
You cannot play it online.
playr.org, you can play pokemon games up to 2nd generation.
There is no legal way to play Pokemon Platinum online for free. You need to purchase or rent the game on Nintendo DS or borrow the game from someone you know who is willing to lend it to you.
you can't
I believe it is impossible without a download.