pokemon events, or trade the event pokemon from a diamond/pearl/platinum game.
Yes, you can. All you have to do is finish the game and then you are able to trade any Pokemon. like diamond, pearl, platinum, heartgold, and soulsliver.
of course you can
Same way you evolve a Machoke in any other Pokemon game. You have to trade it to a different generation four Pokemon game. (ex. Diamond/Pearl/Platinum or HeartGold/SoulSilver)
Technically,yes you can get Arceus in Pokemon Heartgold,but only by trading it to your Pokemon Heartgold game from Pokemon diamond,pearl or platinum.
You have to trade it over from a 4th gen game (Diamond/Pearl/Platinum) or from a friend. You can't get a Prinplup otherwise.
You can trade it from Diamond, Pearl, Platinum, HeartGold and SoulSilver.
Sadly you can't as you can catch rare Pokemon fairly easily on Pokemon ranger and it would be cheating especially with those rare legendaries. Although you can trade heartgold, soulsilver, pearl, and diamond with platinum. You can also trade Pokemon from earlier generation games using your internet.
It is possible to trade Pokemon platinum to diamond and pearl, but you cannot trade to any other game.
You have to either get one from the pal park (which to do you would have to get it from a Hoenn game, then an original Johto game, then get it from Red, Blue, or Yellow), or trade from HeartGold or SoulSilver.
You can find it in Pokemon Platinum, Pokemon Crystal, Pokemon HeartGold, and Pokemon SoulSilver.
You cannot get Rayquaza on Pokemon Diamond or Pearl unless you transfer it over from a Gameboy game using Pal Park, or trade it from HeartGold or SoulSilver. ~Lucario