If you have a pokeball or greatball availble and there is a really good Pokemon (depends what level and where they appear rare or common) and you are too power and might kill them? Well, throw that ball but make sure you have a lot. When you throw it don't press anything until it hits the ending point, at that point, Press and hold the A button. Sometimes it works, sometimes it doesn't, but it does help alot when trying to catch legendaries. Articuno is the worst to try with pokeballs and greatballs, All though I didn't have enough money at the time to get ultraballs. But you do that and many times if needed, if you do it right the first time, you will catch 60% of the Pokemon you find on the first throw. Hope this helps you catching Pokemon.
May Arceus be with you.
Added by: worldsoffunwithl.. Apr 28th 2011, ID#13467