Here's how you can encounter Lugia and Ho-oh in the games:
* Pokémon Silver and Gold: Lugia and Ho-oh are the legendary birds of these games. You can encounter them by completing certain parts of the story and using the right items.
* Other Pokémon Games: These legendary Pokémon have been featured in other games (like Pokémon Ruby and Sapphire, Pokémon HeartGold and SoulSilver, Pokémon Omega Ruby and Alpha Sapphire, and Pokémon Let's Go Pikachu and Eevee). The methods to encounter them vary depending on the game.
* Pokémon GO: You can sometimes encounter Lugia and Ho-oh in special events in Pokémon GO.
Remember: Catching these legendary Pokémon is challenging and usually requires you to progress through the game's story, complete specific tasks, and perhaps even use special items or abilities.