I can't seem to even use a move when ever I battle Latios, it just flees right before i can even use block or mean look.
Yes, roaming Pokemon are quite hard to catch. Here are some strategies:
You need to use a pokemon like dugtrio. Since his ability prevents escape, you will be able to battle latios with dugtrio. You can also throw a master ball at it. Hope this helps!
How to change your username How to add a user avatar Why was my post hidden? Question etiquette Flags vs Downvotes Anime FAQ Official PokemonDb League
Type a Pokemon name, type, move or ability to see instant results.