first go to oreburgh city then go to mt coronet i can say that will 100% work
spear pillar on diamond, pearl, and platinum.
yes only at spear pillar
in spear pillar.(spear pillar is at the top of mount coronet)
Spear Pillar is exactly where it was in Diamond and Pearl; Mt. Coronet.
Dialga is in Spear Pillar and Spear Pillar is located deep in Mt. Coronet.
spear pillar
at spear pillar
At the spear pillar.
No one knows.Once you defeat him at the spear pillar he'll be gone forever .
the spear pillar is only in Pokemon pearl and diamond . it isn't in Pokemon heartgold or soulsilver
spear pillar
dialga--spear pillar