You Can not
Go to Toys R Us and ask them but I think the event is over...
Its impossible to catch Mew in anyway without cheating. The Pokemon you might be thinking of is MewTwo and it can only be caught in Cruelean Cave.
trade from hg/ss or migrate from fire red/leaf green otherwise its impossible without cheating.
You have to catch all Pokemon (the ones you can't catch TRADE)
its impossible because i have sapphire and there alike and i beat the game and you can't get even as a starter Pokemon
No, you cannot catch a mew in Pokemon Platinum without cheating.
you cant
Simple Go to tall grass in Route 111
No, not without cheating.
You cant without cheating
Level 100 Pokemon do not naturally appear in the wild in Pokemon, so you cannot catch them without cheating.
Only if you got the event.
No not every pokemon. You can't catch the starter Pokemon and many of the rare pokemon, you have to trade with Diamond. sorry ...
you can't
i know how to get nearly every Pokemon without a cheating device. do you know how to get Deoxis on emerald Or is there a way to get Darkrai on diamond without cheats?
Without trading or cheating, you can't. It's a Pearl exclusive.
You can't catch Deoxys without having gone to a Nintendo Event (which has been passed for several years now) where you get something that allows you to go to the island where you can catch Deoxys, or without cheating. It's impossible.