Mirage Spot Legendary Pokemon

Mirage Spots with Legendary Pokémon:

Trackless Forest
Soaring in the Sky (Near Dewford)
Soaring in the Sky (Near Fortree)
Crescent Isle
Nameless Cavern
Fabled Cave
Gnarled Den
Pathless Plain

OTHER
Sea Mauville


TRACKLESS FOREST
#243 Raikou
#244 Entei
#245 Suicune

Have Ho-oh or Lugia in your party

Raikou: Can be obtained between :00 and :20 of every hour
Entei: Can be obtained between :20 and :40 of every hour
Suicune: Can be obtained between :40 and :00 of every hour

SOARING IN THE SKY (NEAR DEWFORD)
#483 Dialga (AS)
#484 Palkia (OR)
#487 Giratina

Dialga: Have Uxie, Mesprit, and Azelf in your party
Palkia: Have Uxie, Mesprit, and Azelf in your party
Giratina: Have Dialga and Palkia in your party

SOARING IN THE SKY (NEAR FORTREE)
#641 Tornadus (OR)
#642 Thundurus (AS)
#645 Landorus

Tornadus: Have Castform in your party
Thundurus: Have Castform in your party
Landorus: Have Tornadus and Thundurus in your party.

CRESCENT ISLE
#488 Cresselia

Random Mirage Spot

NAMELESS CAVERN
#480 Uxie
#481 Mesprit
#482 Azelf

Have 3 Pokémon with max Happiness in your party

Uxie: Can be found between 20:00 and 21:00 (8PM-9PM)
Mesprit: Can be found between 4:00 and 19:59 (4AM-7:59PM)
Azelf: Can be found between 21:00 and 3:59 (9PM-3:59AM)

FABLED CAVE
#643 Rehsiram (OR)
#644 Zekrom (AS)

Have a Level 100 Pokémon in your party

GNARLED DEN
#646 Kyurem

Have Zekrom and Reshiram in your party

PATHLESS PLAIN
#638 Cobalion
#639 Terrakion
#640 Virizion

Have 3 fully EV Trained Pokémon in your party

Cobalion: Sunday, Wednesday, Friday
Terrakion: Tuesday, Saturday
Virizion: Monday, Thursday

SEA MAUVILLE
#249 Lugia (AS)
#250 Ho-oh (OR)

Go to Sea Mauville's basement and find a hidden item called the Scanner. bring it to Captain Stern in Slateport City. He'll give you the Yidal Bell (AS) or Clear Bell (OR). Go to the top of the ship for Ho-oh, or back down to the basement for Lugia.