You can't
it's tough but you have to trade palkia, dialga and giratina over to either heartGold or soulSilver. then you must go to the ruins of alph and talk to the arcealogist and he will bring you to the ebedded tower to where arceas is. you find him at lv.70. i hope you get him! -RR14
I think it's Arces IDK if it is but I'm thinking it is but good luck trying to find the answer your looking for alright!!!! POKEMON!
hall of origin
You can't find registeel in Pokemon HeartGold.
You can find it in Pokemon Platinum, Pokemon Crystal, Pokemon HeartGold, and Pokemon SoulSilver.
unkowns {pokemon}
You cannot find Latios in Pokemon HeartGold unless you went on wi-fi and got the Enigma Stone
yes
Just find them!
You can't
trade
You can't do it.