Duskull is a Sinnoh pokemon as in pokemon platinum you get darkrai which is the evolution of duskull.
you can't get sinnoh in heartgold.
Pokemon HeartGold Will Have Sinnoh,Kanto,But Hoenn Least Likely.
You don't you have to migrate to get sinnoh pokemon.
no
you simply cannot
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).
Thursday radio
unfortunately, you can't
You cannot do anything in Sinnoh in HeartGold. You can only go to Johto and Kanto. Sinnoh is not available to travel to.
you cant get to sinnoh in heart gold, but you can find the gym leaders from sinnoh.
A Chimchar is a starter Pokemon and can only be found in Sinnoh
I think your talking about HeartGold/SoulSilver. In Pokemon HeartGold/SoulSilver you're not capable of going to the Sinnoh region, only Jhoto and Kanto are avaliable.