Pokémon Ruby Tips

How To Get Latios
After you beat the Pokemon League, the T.V. will say there is a "blue flying pokemon seen in Hoenn locales." Search the grassy or sea areas and you'll eventually find it. Next, go to Mauville City. Keep going in and out of Mauville until Latios is in your area. When you find it, have a Golbat that knows Mean Look with a speed of 95 or higher. When its health is low, use ultra balls(or timer balls if it takes a long time in battle) and you'll eventually nab it!
Hope this helps ya out!