Well, in Pokemon Platinum, all you have to do is see the Pokemon rather than capture it so if you're able to battle a trainer with that Pokemon, it will still count in your Pokedex. However, you can also make trades with people who do have those Pokemon or borrow a GBA game from a friend.
NO, that is impossible. You need to trade and migrate Pokemon to complete the national dex.
Yes, but you must have the national pokedex
yes.
You need the National Dex before you can migrate. Go to Pal Park, save the game, get the Pokemon you want to migrate in the PC, save again, play Platinum and at the menu it will say migrate from Emerald. Im the Pokemon expert. you are very lucky.
You need to go to pal park in Pokemon platinum to migrate.
You go to route 228 after you get the national pokedex and migrate Pokemon from leafgreen
Migrate Charmander,Charmeleon,or Charizard after U have the national dex.
its migrate and yes but only if you have a national dex
You'll have to trade it from Pokemon emerald or get the national pokedex on pk platinum and cause it to migrate from the emerald game pack. I did so.
its bulbasaur, and you need to migrate it from fire red or leaf green.
You cannot find Mewtwo in Pokémon Platinum. you have to migrate it tto the pal park after you get the national pokedex.
you trade not migrate from platinum and you do that by going upstairs in the poke center