Location from pokemon-sinnoh by
The peak of Mt. Coronet — a ring of stone pillars where Sinnoh's Creation Trio can be summoned and where Cyrus attempted to remake the universe.
Spear Pillar is the reason Mt. Coronet exists in the religious imagination. At the altar, with the Red Chain and the Adamant and Lustrous Orbs, it is possible to force a summoning of Dialga and Palkia. Cyrus does this. The pillars glow. Reality warps. Ash and Cynthia and the heroes hold the line just long enough for Giratina to manifest.
A ruined plateau at Mt. Coronet's summit, ringed by four enormous weathered stone pillars inscribed with runes. The air is thin and cold. A central altar faces the sky. From the summit you can see the whole of Sinnoh laid out like a map.
Also known as: Spear Pillar, the Pillar