Quote: hardcoreignitorCaught Zygarde in just 2 Dusk Balls. Whittled it down to low yellow health in about 3 turns, and then fired away. I replaced Tyrantrum with Zygarde on my Elite Team now.
ALSO:
Looking for a Dusk Stone? After you beat Team Flare, go to Laverre City. To the North there is a now ex team Flare Grunt. Talk to him and you will get a Dusk Stone.
In my Pokemon Games I'm always able to catch the Main Legendary and Side Legends by use of this easy method
1. Before you fight the Legendary put a pokemon with a paralyzing move in front
2. On the first move paralyze the Pokemon, this will save the hassle of any hard hitting physical attacks
3. Whittle it down to yellow zone
4. Don't just throw Ultra Balls, look to see if there are any Balls that have an increased catch rate on the type of pokemon you are catching (dusk ball for dark types)
5. Switch to your highest HP pokemon and spam the hell out of that kind of ball
6. If it takes too long throw a timer ball