No, only when there is a event for deoxis
You get to double battle Lance and Clair in the Dragon's Den after you have defeated your Rival in Mt. Moon.
There is no Mt. Coronet in HeartGold as it does not take place in the Sinnoh region
Mt. Silver Walk-through included below
One of my friends told me you can get jirachi at the end of Mt. Moon and I have tried but I can't figure out how to get there. I do believe there is a jirachi in heart gold version because there are sinnoh Pokemon in it and I have found mewtwo. In gold version however, jirachi cannot exist for gold version was made before jirachi was. I wish you luck in finding the legendary jirachi and other Pokemon!
No, only when there is a event for deoxis
he's at Mt. Silver. Mt. Moon is about the size of a shoe-box, and there really isn't anything hidden in there. you'll need flash to get through Mt. silver if you're on gold, silver or crystal, and you'll need rock climb if you're playing heart gold, or soul silver.
Mt Moon is only one floor in Heart Gold/Soul Silver.
Pokemon league After beating him in mt moon Go up the stairs Untill your rival comes NOTE: he is only there on certain days this also works for heart gold
I think? Yes im 50 percent sure.
You get to double battle Lance and Clair in the Dragon's Den after you have defeated your Rival in Mt. Moon.
There is no Mt. Coronet in HeartGold as it does not take place in the Sinnoh region
its right of ecruteak city.
Deep in Mt Silver
East of Ectearuck city
Using digletts cave to get to pewter city you need to go east of pewter city and mt moon is over there.
elite 4 or mt silver