mitsu

Look, Latias (and latios) can be encoutered ANYWHERE outside. Not caves, not inside, not underwater, but in grass, and ponds and oceans whilst surfing. Knowing where someone else found it will not help you. Just keep looking and use a master ball to catch it when you find it.

I have played through sapphire, ruby and emerald all several times, and sometimes I have found it really fast and sometimes it takes ages... Like 20 hours or more! It is a chance encounter. Also in answer to your first question, each time I encountered latios or latias, it has been in a totally different spots, everywhere on the map. My advice just do circuits of the entire map... Latios will really only move when you move to a different part of the map... And when you go inside a building. A good strategy is to keep leaving and returning to one spot and searching around for a bit... This way you might encounter your lati easier.

Latias has the same chance of being anywhere... Use your masterball when you see it.

I hope these answers haven't disappointed you, but here's a link that may help you a little more than I can! Just keep searching. The Lati is there, you just have to find it!

Http://www.serebii.net/pokedex-dp/380.shtml

That is serebii's pokedex entry for latias, cut and paste or copy and paste the link into your browser. This website is really informative and helps for tricky stuff like this!

evanescense_gossamer

Hey, the Pokemon that you are looking for is found in mainly grass(well, at least for me). The VERY best(and only)way of catching it is to save your masterball until after you capture the Pokemon on Mirage Island. It takes a long time to find Latias. If you are searching for Latias or any legend Pokemon, then make SURE to save the game before encountering it. Such as, if you are in grass and looking, just save every now and then. This can help you if you try catching it and it runs from you, then you can just turn off the game without saving it, then it will start over like you never even saw the Pokemon before. And like the other people above me, there is absolutely NO specific spot to where Latias is. I hope that is helps you, because I have been playing Pokemon since I was old enough to read.

JazzyPieces

1. Where did you catch Latias? Tell me the exact Route. -Route 118. Just west of the Berry Master's house.

2. If you have caught it, how long did it take for you to at least find Latias?
-Hahahaha, 2 minutes. Lucky me.

3. Where is the best place to search for Latias? I'm talking about grass, water/cave or the Route. -She's anywhere. But my personal tip? I've heard this work for other people as well. Look for strange rain. Find a route where it's raining, but it shouldn't normally rain there. My case, it was raining at berry master's...it usually never does. When I noticed that, I flew to lillycove and came around the long way (surfing south of mt pyre) to go to the lake near his house, and surfed around. After about 8 encounters, I traveled west onto route 118, and walked around in that first patch of grass. She popped up after 1 or 2 encounters. And I freaked out :)