How To Get To Spear Montain In Mt.coronet In Pokemon Platinum?

To get to Spear Pillar go to Mt. Coronet through the Oreburgh side. I think thats what the towns called. The one with the coal mine thing I think. Go over to the right outside of the town then find the hole in the wall on the left and go in it. You will be in Mt. Coronet. You will need the HM rock climb. Climb up the wall where the foot prints are on the very back wall on the right. There will be a few times that you will have to go outside of the cave and walk on the snowy mountain. You will also have to battle  many Team Galactic members. Also press A on some of the small brown rocks, because many have items including mushrooms (idk what they're for). At the end you will get out and have to battle two Galactic Commanders (I forgot  which ones) in a double battle with your friend/rival. At the end he will heal your pokemon. Then you will go up to CYrus and talk. He will summon Dialga and Palkia, but then Giratina will appear, opening a portal to The Distortion world. Get through it (it is confusing) and at the end battle Cyrus, then catch or beat Giratina(level 47 Ghost Dragon) . After that one you get the Grisious orb for Giratina (Turnback Cave at the fourth lake, Sendoff Spring) and the adament orb (I think thats what its called) and the lustrous orb for Dialga and Palkia, go back to the spear pillar and a blue portal will open. Go in it to catch Dialga(level 70 Steel Dragon). Once You catch/beat Dialga a pink portal will open where you can catch Palkia(level 70 Water Dragon). Sorry that my answer is so lengthy. I hope I helped!