However, you can trade them from those games into Emerald. Here's how:
1. Obtain a copy of Pokémon Ruby or Sapphire. These games are where Latios and Latias can be found.
2. Find Latios or Latias in their respective game:
* Latios is found in Ruby - Look for it in the Sky Pillar, a location you unlock after defeating the Elite Four.
* Latias is found in Sapphire - Also found in the Sky Pillar.
3. Catch Latios or Latias - This is the tricky part! They are very strong and hard to catch. You'll need to weaken them and then use a lot of Poké Balls, Ultra Balls, or even Master Balls if you have them.
4. Trade Latios or Latias to your Emerald game. Use the Game Boy Advance Link Cable to connect the two games.
Important Note:
* You can only catch Latios in Ruby and Latias in Sapphire. You cannot find them in the opposite game.
* You can only obtain one Latios or Latias per game.
* If you have both Ruby and Sapphire, you can catch both Pokémon, then trade them to Emerald.
Good luck catching these legendary Pokémon! Let me know if you have any other questions.