First you need to beat both games, like beat the elite four in sapphire and beating Greevil in XD. Then you go downstairs in the Pokemon center in Phenac city and trade. The only way to trade is you need a chord that can connect a gamecube and a GBA
trade from emerald is the only way to get mew in xd
you dont. you have to trade from emerald.
trade it from ruby or sapphire
Trade one from ruby, sapphire or emerald to xd.
There is no mew in sapphire.
You can't catch Mewtwo on XD, Colosseum, Ruby, Sapphire or Emerald. Mewtwo can be caught in the Fire Red or Leaf Green Version then traded over to Emerald, Ruby, Sapphire, Colosseum or XD.
you cant unless u trade
You cannot. Trade it from Fire Red or XD.
There are no Seedots in Pokemon Sapphire. To get one you need to trade from Ruby Emerald, or XD
you have to trade with pro oak a mew
Use gameshark with a pokemodifier, or trade it from firered or leafgreen.
You must first get it from Emerald version and then trade it over. But if you have just Sapphire, you can't get it. you can"t get him but you can get him on gts You can't. You need to get it in another game pak. Fire Red for instance. Capture the Mew in Fire Red or Leaf Green and trade it to sapphire.