Pokémon Omega Ruby and Alpha Sapphire are filled with Legendary Pokémon from past games. However, making them appear can be a lengthy and complex process. It often depends on which Pokémon you have on your team and when you approach the new Mirage Spots. Changing the 3DS’s internal clock to the correct times can lock the Legendaries away for 24 hours, so it's crucial to stick to the time that your 3DS is set for.
The Legendary Pokémon include Latios, Latias, Groudon, Kyogre, Heatran, Ho-Oh, Lugia, Rayquaza, Raikou, Entei, Suicune, and the Regi trio. Each has a specific method to make them appear. For example, Latios or Latias appear during a conversation while traveling along Route 118. Ho-Oh or Lugia can be found after encountering Groudon or Kyogre, and the process to make them appear is the same.
The Regi trio is unlocked by having a Relicanth as the first member of your party and a Wailord as the sixth member. There is also a specific process to unlock the appearance of Regigigas. To trigger Mespirit’s appearance, you must have three Pokémon on your team with max happiness. Uxie and Azelf can be captured by entering a specific area at specific times.
The Swords of Justice trio can be found by soaring near Pacifidlog Town and having three Pokémon on your team with maximum effort values. Reshiram in Omega Ruby and Zekrom in Alpha Sapphire can be caught by having a level 100 Pokémon on your team and soaring near Mauville City. Kyurem appears when you have both Reshiram and Zekrom on your team.
Tornadus in Omega Ruby or Thundurus in Alpha Sapphire can be found by having a Castform on your team and soaring toward Fortree City. Landorus can be caught if you have both Tornadus and Thundurus on your team. Cresselia appears randomly on a different Mirage Island that appears on the world map each day.
1. "Pokémon Omega Ruby and Alpha Sapphire are filled with Legendary Pokémon from past games."
2. "The process of making these Legendary Pokémon appear can be lengthy and complex."
3. "The appearance of these Legendary Pokémon depends on which Pokémon you have on your team and when you approach the new Mirage Spots."
4. "Changing the 3DS’s internal clock to the correct times will lock the Legendaries away for 24 hours."
5. "The first Legendary Pokémon to encounter is either Latios or Latias, who will appear during a conversation with Steven Stone while traveling along Route 118."
6. "Groudon and Kyogre will appear in their respective games in their Primal forms during the story."
7. "Heatran can be encountered at any point after the showdown with either Groudon or Kyogre."
8. "Either Ho-Oh or Lugia can also be found after your encounter with Groudon or Kyogre."
9. "Rayquaza can be encountered during the new Delta Episode that takes place after defeating the Elite Four."
10. "Once you have the Eon Flute, you’ll be able to soar in the sky."
11. "A landing point called the Trackless Forest will appear where you can encounter Raikou, Entei, and Suicune."
12. "The process of unlocking the Regi trio is the same as the original Ruby and Sapphire."
13. "Regirock, Regice, and Registeel can be encountered by following a series of steps and conditions."
14. "Triggering Regigigas’s appearance requires the Regi trio on your team and Regice having a nickname."
15. "In order to trigger Mespirit’s appearance, you must have three Pokémon on your team with max happiness."
16. "To trigger Uxie and Azelf’s appearance, you must enter a specific area at specific times."
17. "Palkia and Dialga can appear in a tear in the sky if both are on your team."
18. "The Swords of Justice trio (Cobalion, Virizion, and Terrakion) can be encountered by having three Pokémon on your team with maximum effort values."
19. "Reshiram and Zekrom can be caught by soaring near Mauville City and having a level 100 Pokémon on your team."
20. "Kyurem can be caught if you have both Reshiram and Zekrom on your team."
21. "Tornadus, Thundurus, and Landorus can be caught by soaring near a specific location and having a Castform on your team."
22. "Cresselia can be found on a different Mirage Island that appears on the world map each day."