no that is a separate event
There are no Sinnoh ruins in the entire pokemon world. If you mean the Solaceon Ruins in Sinnoh, you can't go to sinnoh in HGSS. If you mean the Ruins of Alph, they're between Routes 32 and 36.
You cannot do anything in Sinnoh in HeartGold. You can only go to Johto and Kanto. Sinnoh is not available to travel to.
Sinnoh is not in the game. However, if you have an Arceus, you can go to a fake Sinnoh (Just a tiny little part) through the Ruins of Alpha.
No, Sinnoh is not available in HG. But, if you have the Event Arceus, you can go to the Sinjo Ruins.
if you got the special Arceus from Toy's R Us you take him as the the first Pokemon of your party and take in to the ruins of alph and the event will begin
Honestly Sinnoh is a place you are stating it as it is a pokemon? Id advise you to say how do you get TO sinnoh. But no you can not go to sinnoh nor can you go to kanto from sinnoh. But in heartgold you can go to Johto.
You put down your ds, drive to walmart, buy Pokemon platinum, and there ya go. (you cant go to sinnoh in HG you can only go to the sinjho ruins and the fronteer)
Yes you can at the Solaceon Ruins. Battle/Catch 99 Unknown and the 100th Pokemon you see will be Celebi.
no
unkowns {pokemon}
not without buying a 3ds and a new pokemon game with tho pokemon bank and transporter apps.
The Ruins of Alph.