first go to pewter city via digglet tunnel
the Viridean Forest is close to Viriden City in pokemon soulsilver
viridean city
After defeating Blaine of the Cinnabar Island Gym Leader, fly back to Cinnabar Island and Blue should be there. He will explain to you about his Champion life and Red, and he will say that he will meet you at the Viridean City Gym. Fly to Viridean Gym and battle him.
Blue is the guy you go to if you want to find the viridean gym leader
Sorry for the spelling. Go to viridean , go in the department store then go to the bottom floor , go to one of the bothes
You cannot get Dialga in HeartGold version.
you can't get sinnoh in heartgold.
They are not in Pokemon HeartGold
Hoenn is not in heartgold version, only johto and kanto are in heartgold, hoenn is in emerald
HeartGold is the correct title.
You have to trade it to HeartGold from P/D/Pt
you can catch lugia in whil islands in heartgold