The spear pillar is at the top of mt. Coronet. I know how to get there by heart!
Pokemon Platinum How To Get To The Distortion World?
Route 214 after getting the national dex. .
I actually don't know but I am looking all around this internet looking for the answer.
Go to spring path and keep goin' up.you'll find giratina. After you catch it a potal will pop up . Press a wen close to it.
You have to get 1st 7 gym badges and go to the spear pillar, where you see, dialga, palkia (They go into you pokedex) and giratina, cynthia the comes, and asks if you want to go in with her.