Latios roams across the land. its luck if you find it in any random patch of grass.
you cant catch latias or latios in diamond/pearl. you can migrate latias and latios from emerald, ruby, sapphire. in case you dont know, you get latias/latios at the end of the game and the mother tells you what color(red-latias/blue-latios) the guy on tv says. the hard part is to find it. it randomly appears any where on hoenn.
You'll find Latios at the end of Southern Cavern, who you'll bring back to the Town Square.
After beating the elite four you will end up back at your house when you go downstairs you will talk with your mom and dad, dad will leave then you will watch TV. Answer the TV's question with Blue. Now go to any route where grass or water is and keep running into battle until latios appears good luck finding it and when you do weaken it don't make it faint. When it runs away find again it will still be weakened now quickly throw an ultra ball and hope you capture it.
first you need to beat latios then you will gain excess to pitfall valley get to the end save latias then latias will ask to join your team pick yes and you have latias and latios. (you have to beat rayqwaza before this )and latios is at the end of northern range.
If you want to catch Latios or Latias in Emerald, follow these steps. #1Beat the Elite Four. When the credits end, go to the TV. The TV will say something about a Pokemon soaring through the sky. Then it will ask what color it was. I recommend blue. #2Wonder the Hoenn Reigon. Eventually, you'll find Latios or Latias -SLICK
Humans trying do destroy Latios and Latias
You face Latios.
hibyehibye'
They are located at the end of the spark plug wires.
i am looking for the same question i cant find it
no one knows exactly where but their was a report that he is at a far away place. at the end and your in your room come down stairs and you will find out.
You have to find an End-Portal in a stronghold. The probablility of finding a stronghold with an End-Portal in it is small. Because there are 3 strongholds per map, and there is 1 end-portal per game.