You have to wait for an event if you don't want to cheat. Or you can get it on Pokemon ranch. Or if your friend has it, YOU SHOULD DEFINITELY TRY TRADING!
In any game of Pokemon, not just Diamond and Pearl, you either cheat to get him, which i wouldn't recommend, or wait for an event for mew. Mew is my favorite Pokemon!
there is no mew 3 in all of Pokemon history. there is only a mew and mewtwo
Mew was a special event Pokemon that was distributed for Pokemon Red and Blue. Mew cannot be found in the wild without cheats or using glitches, which is still possible to obtain. Bulbapedia likely have a great summary about this Mew glitch in Pokemon Red and Blue.
It is an event where you can obtain MEW. MEW is a Pokemon that you can only obtain in an event, or hacking.
You cannot legitly obtain it. You must use a form of cheats (action replay, gameshark, etc.
migrate
you cant get mew unless you get it from Pokemon ranch on Wii or download mew from events on GBA games and pal park it. or if your freind has it trade.
you cant
Nope.
You obtain a Mew by a Mystery Gift.
you have to have cheats there is no way to get shiney mew in platinum
no you must use cheats because mew hasn't been relaesed in America