You can catch it in the safari game
Beat the other events in the game (elite 4, the islands and stuff), go north out of Cerulean until you can surf down the western water. The guy will be gone from the entrance of the cave. I think you need flash but Mewtwo is at the very end. It is very hard to catch since it is the main legendary.
It's not possible to trade from Diamond, Pearl or Platinum onto any previous game regardless of what system it was for.
1 way is 2 trade it from Pokemon colloseum onto a GBA game (firered, leafgreen, ruby, sapphire, emerald) and then migrate it on2 diamond/pearl.
trade diamond from Pokemon diamond onto Pokemon pearl
Yes, you must Pal Park the Pokemon you want onto Pokemon Pearl. You can only Pal Park after beating the Elite Four though. Hope this helped!
(migrate from emerald.) Now you can use HGSS to trade a feraligator to pearl.
Of Course ......NOT!!!
Sorry, but Pokemon Diamond and Pearl don'tconnect with Pokemon DX, but you can trade Pokemonfrom Pokemon Heart Gold/Soul Silver onto Pokemon Diamond, Pearl and Platinum, and you can Migrate Pokemon from Pokemon Ruby, Sapphire and Emerald.
to trade from leaf green/fire red to diamond/pearl/platinum you av 2 put the gba game in the gba slot an the ds lite and go onto dia/pearl/plati and select emigrate from leafgreen/firered and select the Pokemon u want 2 transfer then on the ds games go to pal park and u can catch the Pokemon u av transfered :):):)
It is possible you are trying to trade Pokemon from the hoenn region (ruby, sapphire, emerald) onto firered/ leafgreen. This is not possible until have done a certain thing. The other possibility is that you need at least 2 Pokemon to trade.
first it is arceUS second yes you can trade legenderys onto Pokemon soul silver but only from pearl,diamon and platinum
Answer: Yes you can. Well, you can only do it with the generator. It only helps to trade from- Pokemon mystery dungeon, to Pokemon diamond/ pearl. It can pass onto many Pokemon generation games, and plus, it's very useful, it's not out yet. At summer it will come. But I think if you're lucky, you can get it from the web.
you insert the game boy game then turn on Pokemon pearl and there will be a thing that says migrate from, and then the game name and the go to the pal park