When the player returns to the Spear Pillar with the Azure Flute, he or she will be asked to play it every time they step one tile north from the entrance. Upon doing so, a staircase will appear, leading to an elevated glass platform high above the Spear Pillar, where Arceus awaits the player's challenge. While the player ascends the staircase, the camera will broadly tilt upward and zoom out, giving the player a unique view of the area below. Stepping onto the edge of the glass platform will automatically initiate the encounter sequence and battle. Once Arceus is caught, the Azure Flute will no longer open this staircase and the message "The Azure Flute echoed hollowly..." will be shown. Should Arceus be defeated rather than caught, the Azure Flute can be reused so the player can attempt to battle it again.
In terms of game mechanics, when the player accesses the Hall of Origin by playing the Azure Flute, he or she is actually no longer on the Spear Pillar but rather in a completely separate location, as evidenced by the screen fade-out transition and the change in location header. That is, the game does not place stair tiles onto the Spear Pillar map, but rather warps the player to a new map containing the stairs where the surrounding area looks identical to the Spear Pillar. This dispels a rumor that cheating to reach the Hall of Origin would trap the player on the elevated glass platform without the stairs to lead back down.
Like the Spear Pillar, the Hall of Origin is an internal area separate from Mt. Coronet, so the Escape Rope as well as Fly cannot be used to leave the location. However, like the Spear Pillar, it is within the range of Mt. Coronet's strong magnetic field and so Magneton and Nosepass will both evolve here if leveled up.
| Special Pokémon
| A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
The theme of the Hall of Origin is a remix of Introduction, and the latter's first notes are also used for the Azure Flute theme.
- If the Sinjoh Ruins event has already been activated with an event Arceus, another Arceus caught in the Hall of Origin may be used to go back to the Sinjoh Ruins and choose one of the Pokémon that were not chosen previously. The reverse order is also possible. However, the event can only ever be activated twice at most.
- Two versions of the Hall of Origin map exist in Pokémon Diamond, Pearl, and Platinum: one is the real location while the other is a "fake" copy. The "fake" Hall of Origin uses Spear Pillar as its theme and can be accessed through the void glitch using "Stickyman's Spear Pillar Hall of Origin" method, named after its discoverer. The "fake" Hall of Origin contains no warps or events and no Arceus. (YouTube video)
- Regardless, it is impossible to battle Arceus even in the real Hall of Origin except through playing the Azure Flute in Spear Pillar. Arriving at the Hall of Origin through other means will prevent any of the usual events in the area from triggering, so the camera will not tilt as usual while the player ascends the stairs, and Arceus will not challenge the player when they step onto the glass platform. The Arceus sprite still appears, but just as in the actual event, it cannot be directly interacted with. This makes Arceus inaccessible through the glitches that enable access to Darkrai and Shaymin, such as the Surf glitch and the aforementioned void glitch. Additionally in Pokémon Platinum, as with Darkrai and Shaymin, the Arceus sprite will not appear in the area at all unless the player has the Azure Flute in the Bag.
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