Depends on the game.
Latios will show up on your pokegear map after you take the ss aqua to Vermillian City and talk to Steven in the ship building.
latias or latios will show up on your pokegear map just like raikou and entei
it should. if it says, "they seem to play with other pokemon" wait and maybe an egg will show up.
You need to get the HM Surf first, after completing the main storyline.
Is to never give up on finding and capturing Latias or if your friend has Latias from his Pokemon games, he can trade it with you if he/she wants.
After beating the Pokemon League, go to your house and look at the TV show currenty on. Identify the mystery Pokemon on TV as blue, and Latios will be anywhere in Hoenn.
Latios roams across the land. its luck if you find it in any random patch of grass.
You have to lock it up on the pokedex.
No only latios and latios can mate.
No. You must get HM03 Surf in Solar Cave 20F after that when you wake up Latios flashes by you go back to sleep wen you wake up Kecleon will be robbed because Latios needs to rescue his sister after you rescue her they can join your team
When you get out of the Pokemon Fan Club after receiving the Poke Doll from the guy in there, Steven (from Pokemon emerald)will come to you and say Latios has escaped from Hoenn and came to Kanto.He will show you a picture of Latios, which will get updated to your pokedex.After Steven leaves, check the map in your pokegear.You should see a symbol of Latios somewhere in the map.That's where Latios is.Latios can escape from you easily.When you're close to the route he's in, he could move to a different place.At battle, Latios can run away at the first chance. Hope this helps!:)
The show airs after becoming a pokemon champion at the pokemon league after watching the show your mom asks what color of the pokemon did the TV mention you get the choice of either picking RED or BLUE picking RED will let you capture Latias and picking BLUE will let you capture Latios.