unfortunately, you can't
Pokemon HeartGold Will Have Sinnoh,Kanto,But Hoenn Least Likely.
No Sinnoh Pokemon can be found in HeartGold or SoulSilver, but you can choose just one of the Hoenn Pokemon after doing certain things (either Torchic, Mudkip, or Treecko).
Duskull is a Sinnoh pokemon as in pokemon platinum you get darkrai which is the evolution of duskull.
sinnoh
You have to beat the Pokemon league in Hoenn, Kanto and Johto. In Sinnoh, there might be some trainers who have Torterra.
you can't get sinnoh in heartgold.
No, Unova, Sinnoh, Hoenn, Johto, and Kanto are not pokemon, but are the reigons of ¨pokemon world.¨
Hoenn is not in heartgold version, only johto and kanto are in heartgold, hoenn is in emerald
You cannot get a Sinnoh Starter. You can only have a Kanto, Johto, and Hoenn starter.
You can't get to the Hoenn region in HeartGold or SoulSilver. However, Latias can be caught in HeartGold, which is a legendary from Hoenn.
Yes,you can but you only get rare Pokemon from sinnoh and hoenn.
Regigigas is a Sinnoh pokemon. Not a Hoenn.