During the story of Pokémon Moon, the player travels to Ultra Space from the Altar of the Moone using Lunala's power.
An entrance can be seen on the other side of the Dragon-type Z-Crystal's pedestal from the trial in Vast Poni Canyon. It will lead the player to an immensely deep and vast canyon with an extremely long staircase with holes in some spots on the sides. At the top of it, there will be three staircases that get thinner and shorter progressively. At the top of the second, there will be paths leading in a circle on both sides. There are also two pedestals bearing the Moone symbol on both sides of the third staircase, which leads to a center area with a rhombus-like shape with a large, Moone symbol in the center. On the left and right of this are paths to stone "islands" with water surrounding them. These appear on each side of a crevice in the middle that is filled with water. The water surrounding the islands flows from a small stream that connects to two spires that lead to a giant circular door resting on a huge mass of rock, but it only opens in a certain part of the storyline.
In Pokémon Moon, after becoming Champion, if the player has Solgaleo in the party at night or Lunala during the day, they can open the dimensional distortion into an Ultra Wormhole and travel to an alternate world. This world experiences day when the other world is in night and vice versa, similar to Pokémon Sun. Unlike Pokémon Sun, however, this world's time is not offset by 12 hours from the other world's; rather, whenever the player enters this world, it is always the start of either the day or the night (6 AM or 6 PM), from which point time progresses normally so long as the player remains in the world. In this world, the Altar of the Moone is also replaced by the Altar of the Sunne, while the Lake of the Sunne is replaced by the Lake of the Moone. All other aspects (such as the Pokémon that can be found and the fashion items that can be bought) remain the same as in Pokémon Moon in this world. Traveling through the Ultra Wormhole deposits the player at the Altar of the Sunne, where the distortion remains open as an Ultra Wormhole (meaning the player can return at any time without needing Solgaleo or Lunala in their party).
In Pokémon Sun, the player can access the Altar of the Moone by creating an Ultra Wormhole at the Altar of the Sunne to travel there. At the Altar of the Moone, the distortion remains open as an Ultra Wormhole and the player can return to their own world at any time (without needing Solgaleo or Lunala in their party).
In Pokémon Ultra Moon, Necrozma's presence in the party will allow the player to travel to the Altar of the Sunne in the reverse world from the dimensional distortion, provided it is in its Dusk Mane form at night or its Dawn Wings form during the day.
Related cards Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.