Lugia and Ho-oh
The cover Legendaries for Gold and Silver are not found by soaring, unlike most of the other Legendaries. Instead, they will appear after completing the Sea Mauville quest in full, detailed in the aptly-named Sea Mauville in Full section, just a bit further ahead.
Raikou, Entei and Suicune
Raikou, Entei, and Suicune are all three legendary Pokémon infamous for their roaming nature in the previous Pokémon games; in this case, however, they’ll stay in a single spot for once! To be able to make these Pokémon appear, you must Soar with Latios/Latias while Ho-Oh or Lugia is in your party.
With this condition met, the Mirage Spot "Trackless Forest" should appear to the east of the Petalburg Woods. Which you encounter depends on the current time, although the current time only references how much past the hour you are, changing every 20 minutes:
- **Raikou** : Any time from the hour to 20 minutes past it - for example, 1:00 PM to 1:20 PM
- **Entei** : Any time from 20 minutes past the hour to 40 minutes past - for example, 1:20 PM to 1:40 PM
- **Suicune** : Any time from 40 minutes past the hour to the next hour - for example, 1:40 PM to 2:00 PM