
Use something ridiculous to catch it. I managed to catch Groudon in a Premier ball, Kyogre in a Great Ball, and Rayquaza in a Luxury Ball. Every time I ran out of Ultra balls, I just went "why the heck not". Result. It seems that the more ridiculous you go, the better chance you have...to a degree. Reminds me, Emerald was awesome fun. I even have a pikachu named after myself.
I've caught every single legendary (except for the ones that can only be obtained through an event) with an Ultra Ball, Master Ball, etc. I am trying to re-catch every one of them with only a Poke Ball, and i'll have to say, even though I don't have a lot left, it's a very heard task. The best method is to use False Swipe, then freeze, paralyze, or sleep.









