No you can only migrate from GBA games to DS games.
you need to migrate it from Pokemon diamond/pearl/platinum. it is unobtainable in soul silver/heart gold trade, not migrate
you can't get ho-oh in Pokemon platinum only by cheating with AR or r4 or migrate it of Pokemon gold
You need to go to pal park in Pokemon platinum to migrate.
you can't unless you migrate it from gold or silver(in gameboy advanced)
You can't find Chickorita in Pokemon platinum. You have to trade with someone who has that Pokemon Or you can migrate from emerald or wait until heart gold and soul silver comes out
you have to migrate them from fire red or leafgreen or u trade them form gold silver or crystal to ruby and Sapphire then migrate to platinum
You can't send the Pokemon directly from Pokemon Emerald to Pokemon Heart Gold but you can migrate your Pokemon from Emerald to Pokemon Pearl, Platinum, Diamond and then trade it to your game Pokemon Heart Gold as long as you have a friend with a DS(Dsi)
you cant but what you can do is get action replay, migrate it from Pokemon emerald or, you could get it from heart gold or soul silver
you trade not migrate from platinum and you do that by going upstairs in the poke center
migrate
no
yes you can migrate from any of the emerald Sapphire and the other on to platinum