There isn't a difference in wild or legendarys.
The only difference is that the main legendarys are switched but your able to get them anyways.
heartgold but you can get vulpix in soulsilver
HeartGold and SoulSilver are DS remakes of Gameboy versions Gold and Silver.
you can't get to any of the Sevi island in Pokemon Heartgold and soul silver
No, not yet anyway.
There is latios and groudon.
no heartgold is kyogre
go to walmart
you cant but you can trade it from Pokemon soul silver
Arceas has to be caught in Pokemon diamond, pearl, or platinum, then traded to Soul-Silver and HeartGold.
Pokemon Heartgold and Soul Silver are currently available, if you cannot find it I recommend you buy it online.
Pokemon Heartgold.
You have two beat the Pokemon league.