yes, but it depends. if u are using the GTS then no but if u are just trading with some1 on your pal pad then yes.
You can migrate or catch one from a swarm or trade.
No, you don't need the National Dex to evolve Haunter in Pokemon SoulSilver. You just need to trade it with a friend then trade it back. Then, you have a Gengar!
Politoed is a national-dex Pokemon so it can only be obtained through a trade.
Every Pokemon is part of the National Pokedex because it is called the NATIONAL POKEDEX so every Pokemon has to be in there to complete you entire national pokedex. For instanceyou have Pokemon platinum you have some missing Pokemon such as misderaves and murkrow or stunky. The only way to complete your Pokemon dex is trade from all Pokemon games even gameboys or you can migrate from the pal park. So trade Pokemon that you don't have if you want it and your friend has a Pokemon that you want, and he doesn't want to trade for instance like arceus maybe if he doesn't want to give trade your Pokemon then trade it back it will also count as that you have it. HOPE I HELPED P.S sorry i didn't explain much about the mew I sorta got off track.
You can use Pal Park to transfer Pokemon from the third generation (Ruby/Sapphire/Emerald/FireRed/LeafGreen) to the fourth generation (Diamond/Pearl/Platinum). Ditto can be found (in many places, rarity Uncommon) in FireRed and LeafGreen.
You can't catch Ditto in Pokemon Sapphire, but you can trade it to your game from Pokemon Emerald/FireRed/LeafGreen
You can't catch a ditto in Pokemon Sapphire, but you can trade it from Pokemon Emerald/FireRed/LeafGreen.
Unfortunately, you cannot catch Ditto anywhere in Pokemon Sapphire. To obtain Ditto, you must trade from Emerald. You could also trade from FireRed/LeafGreen
you could just get a trade for ditto.
You can't catch Ditto in Pokemon Sapphire. You'll have to trade it from Pokemon Emerald/FireRed/LeafGreen
You have to trade a Ditto from Fire Red, Leaf Green, or Emerald.
You have to trade a Ditto from Fire Red, Leaf Green, or Emerald.
The giant chasm has ditto outside. You can also trade ditto for rotom on route 15.
you have to trade one from FireRed or LeafGreen.
trade for a ditto at route 14.
you trade from emerald
No, because Ditto is not in Sinnoh Pokedex, but if you trade with your friends, then you can get Ditto. Unless if your friends don't give it.