Originally Posted by Legend collector
Bring about 40 ultra balls then 40 timer balls, weaken it to red health and give it a status problem that doesn't hurt it(Paralyz, freeze, Sleep)
If you have a charizard teach it dragon claw that way you wil have the advantage and the yayquazza won't. Hope it helps.
i think that legend collector is right. thats a really good way to catch rayquazza.