Legendary Pokemon are the toughest Pokemon to capture it takes lots of patience. Buy as many ultra balls as you can and then save before attempting to catch a legendary then go into battle with it. Weaken it to red HP then paralyze it if you can or make it sleep if you can then start throwing your ultra balls and hope you get it. If you completely lose your ultra balls turn off the game turn it back on and try again.
You have to defeat the elite four then you can catch the legendary
you have to get more then 45 gym to catch legendary Pokemon! deoxys is a legendary Pokemon
you can catch as many legendary Pokemon but only once unless you have it on the computer
you can't catch it because you already beaten the legendary
defeat all gyms,elite 4 and champion of that region to catch legendary pokemon
Check the link. Go there for the legendary pokemon.
You catch them with a ultra ball
Yes I've done it before.
no
no
to catch zapdos in pokemon black you have to have every legendary pokemon
you first have to catch/defeat the legendary pokemon cobalion in mistralion cave you catch virizion in pinwheel forest