In order for you get Mewtwo in Pokemon Diamond you have to migrate it from either Pokemon Ruby, Sapphire, FireRed, LeafGreen or Emerald. If you have a friend that has one of those games and he/she has only one Mewtwo then you could tell your friend to put Mewtwo in an empty PC Box. Save the game and when it says don't turn off power, turn it off and on again. There will be 2 Mewtwos exactly the same, same moves, levels etc. Your friend now has 100 Mewtwos! Put the Gameboy game (Ruby, Sapphire, FireRed, LeafGreen or Emerald) in your DS and migrate. Transfer Mewtwo from the games via Pal Park (Route 221). Mewtwo will be wandering around in grass areas inside the Pal Park.
Pokemon pearl
yes you can only do it by getting 999 Pokemon from Pokemon pearl and after you get 999 Pokemon talk to hayley and she will give you a mew!
Deposit 999 Pokemon into the ranch from pearl or diamond.
IT DOESN'T EVOLVE
go to pokemon.marriland.com then go to the diamond and pearl pokedex section and search mew. the moves pokemon learn in diamond and pearl are the same as yellow.
Mew cannot be caught on Pokémon Pearl.
You can't find an actual Mew in Pokemon pearl You'll either have to migrate mew,or use action replay
Pokemon pearl
You cant get a Mew without hack
Mew cannot be caught in the wild in Pokemon Diamond and Pearl. You need the action replay code.
you can not get mew in Pokemon pearl unless you use the action replay cards or swap it over a GBA card.
Pokesav
cheat
You may receive Mew in Pokemon Pearl by storing 999 Pokemon in "My Pokemon Ranch" for Nintendo Wii, where Hayley will trade you one, which you can then import to your Pearl game.
If you have log cabin ranch then you can receive Mew from Hayley(only pearl/diamond)
dont no
No either trade our hack