The approximate locations of all Mirage spots. Mirage Caves, Forests, Islands, Mountains, and Crescent Isle are marked by brown, green, blue, red, and white circles (respectively), while other Mirage spots are marked by yellow rings.
Mirage spots (Japanese: マボロシの場所Phantom location) are a strange phenomenon which occur throughout the Hoenn region in Omega Ruby and Alpha Sapphire. Many are random and spontaneous, while others may only be found when in possession of certain Pokémon. These anomalies can manifest themselves in several ways, including Dimensional Rifts, Storm Clouds, and the appearance of entire islands and other landmasses.
Mysterious portals lie in the heart of many of these spots. If interacted with, a Legendary Pokémon will emerge from the portal, initiating battle with the player.
Once every 24 hours, a daily Mirage spot will appear in Hoenn. The player can also encounter more through StreetPass. At the end of a day, all current Mirage spots will fade away.
Most Mirage spots are marked by a glowing red beacon floating over the location when the player is soaring in the sky on Latios/Latias. This marker is always present for daily Mirage spots, but for conditional Mirage spots (aside from Dimensional Rifts and Storm Clouds), this marker will disappear once all Legendary Pokémon at the location have been captured. The disappearance of this marker does not prevent those locations from being visited if their conditions are met, however.
Daily Mirage spots
In the daily Mirage spot that naturally appears in the player's game, there will always be a hidden item; if a Mirage spot is received from StreetPass, it will not have a hidden item. Furthermore, while it is possible for a hidden item to regenerate on another day if a Mirage spot was naturally received (so long as the area can be refreshed without leaving the Mirage spot), this will not happen on a Mirage spot that was received by StreetPass.
On each type of daily Mirage spot, there are several possible items that can be hidden. The item that is present is controlled by a "slot" variable that applies to all daily Mirage spots. The hidden item slots for each daily Mirage spot correspond to the rows shown below.
So, if one Mirage Mountain has a Green Shard on a given day, so will any other Mirage Mountain, and any Mirage Cave will have a Blue Shard; at the same time, Crescent Isle may have either a Deep Sea Tooth or a Razor Claw. The item that the player receives when they pick up the hidden item is determined solely by the current day's slot; that is, if the player saves before the hidden item at a Mirage Mountain one day when the item is a Green Shard, if they load that save again on the next day, they may pick up a Yellow Shard instead.
The Trackless Forest will only appear if the player has Ho-Oh or Lugia in their party. Raikou, Entei, and Suicune can be found here depending upon the time within the hour set on the 3DS.
Brendan approaching a rift
Two Dimensional Rifts can appear in the sky above Hoenn, described in-game as "huge gaps". Both rifts appear south of Dewford Town. The first contains DialgaAS or PalkiaOR and only appears if the player has Uxie, Azelf, and Mesprit in their party. The second gap contains Giratina and only appears if the player has Dialga and Palkia in their party. These battles use the battle intro and visual location used by the mysterious rings found on and in other Mirage spots. After the player has captured DialgaAS, PalkiaOR, and Giratina, the dimensional gaps will no longer appear.
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.
Brendan approaching a cloud
Two black clouds can appear in the sky above Hoenn, both appearing above Fortree City. The first appears if the player has a Castform in their party and it contains TornadusOR or ThundurusAS. The second cloud appears if the player has Tornadus and Thundurus in their party and it contains Landorus. These battles use the battle intro and arena used by the mysterious rings found on and in other Mirage spots. After the player has captured TornadusOR, ThundurusAS, and Landorus, the storm clouds will no longer appear.