No, you don't. You cannot face the Sinnoh Gym Leaders in HeartGold.
you cant get to sinnoh in heart gold, but you can find the gym leaders from sinnoh.
No, but you can challenge kanto gyms
you can't get sinnoh in heartgold.
Pokemon HeartGold Will Have Sinnoh,Kanto,But Hoenn Least Likely.
You cannot do anything in Sinnoh in HeartGold. You can only go to Johto and Kanto. Sinnoh is not available to travel to.
no
you simply cannot
Duskull is a Sinnoh pokemon as in pokemon platinum you get darkrai which is the evolution of duskull.
You don't you have to migrate to get sinnoh pokemon.
You cannot go to the Sinnoh region in "Pokémon HeartGold" and "Pokémon SoulSilver."
Thursday radio
unfortunately, you can't