You can not get a mew in Pokemon Diamond without trading or cheating (HIGHLY NOT RECCOMENDED.) but there is a way to get a mew in the following games: Pokemon Blue, Pokemon Red, or Pokemon Yellow. look up "Mew Glitch" in Google search and find out how. hope this helped!
The only way to get Mew is to go to the Old Sea Chart event, or by hacking the game.
The only way to get Mew in Pokemon Red, Blue, and Yellow is via the Mew Glitch, which you can find on Bulbapedia.
The easiest way is just buy a r4.
i don't really think there's a way to catch mew in Pokemon platinum w/o cheating, but u can migrate it from the gameboy advance games if u have them.
The best way to catch Mew is to catch the two Shedninjas on top of the mountain. Mew is vulnerable to Ghost-type PokeAssists. Use those and couple it with a Fighting-type PokeAssist for a good chance of capture.
You can catch mew in emerald, but u need something called the Old Sea Map, which u can only get in a Pokemon event. People say that there is no way u can get me on any game without an even or cheating. that is false. there is actually a way to get mew only in the following games :Pokemon red, Pokemon blue, Pokemon yellow. Look up "Mew Glitch" in Google to find out how. hope this helped!
before you catch mewtwo type in "one" then save then talk to it its A MEW wee
catch them
use a masterball.
in some cave
sorry no. it's fake. There is a mew and a scientist cloned mew in a movie and created mew 2. the only way there is a mew 3 if they cloned mew 2.