You have to get on the wifi event in platinum and trade it
Well, you can't get arceus in Heartgold, but the is one way which is to use a action replay chip and find the code for it in codejunkies.
YOUR MOM HAS THE CHEAT CODE FOR A LEVEL 100 ARCAUS!
i f you dont have dimond perl or platnom you need to get the special arcaus via mystory gift or trade. this will make an event happen in witch you can get him.
it is the alpha Pokemon and it created the world
the sphere is arcaus the three arownd it are Dialga, Palkia and GIRINTENA
Giritana........................................is awesome! Yeah! Giratina is amazing! After I caught it, I went bonkers on it. Now its my favourite Pokemon! Lugia from the old and awesome silver
They are not in Pokemon HeartGold
You cannot get Dialga in HeartGold version.
you can't get sinnoh in 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