idon't know
You go to the lake and battle Cyrus.
actually yes there is Pokemon lake, Pokemon battle arena.
you have to battle Giratina in distortion world and then you can battle them
In Pokemon Lake click the button that says "Battle" after that click "Megas!". You have to defeat "Garret"
You are now able to battle the Pokemon in the snowpoint temple.
its kinda obvious....just buy pokeballs and battle pokemon and catch them
After you have battled the lake Pokemon they will not reappear. Save before you battle them and then when it goes if you fail to catch it turn off the power and battle them again until you capture them.
you need to click items and if its the first lake you need to go farther into the game
after you defeat Cyrus you can battle dialga then you battle the three lake Pokemon and move on to sunnyshore city. then you go on to defeat the elite 4.
first send your password on shyamcharlizard and then battle all toptrainers in live battle
The one in lake Verity you need her to get your National Dex
you go to the lake of rage and Battle the SHINY gyrados and then you will get it