Of course you can. An easy way to do this is get a Pokemon that knows the moves Hypnosis or Spore, and put the desired Pokemon to sleep. Next, whittle away at its HP with not-very-effective moves. Take a long time, so the ever-handy Timer Ball can come into effect. Then use any of the following Pokeballs. I have listed them in preferable order: Ultra Dusk, (if in cave or night time) Timer ( in obvious circumstances) Heal Net (if the type is desirable) Great Poke
Of course, a Master Ball catches any Pokemon without fail, Legendary or not.
You can't catch shiny legendary Pokemon without cheats... sorry
you have to get more then 45 gym to catch legendary Pokemon! deoxys is a legendary Pokemon
The Master Ball isn't a necessity, since any Pokemon can be caught without it. Use it when you have spent around three days (a couple hours a day) trying to catch a rare Pokemon (legendary only) with Ultra Balls at low HP and with a status problem. It is wise to do so, since you may find that a Pokemon may be tough to catch and you might not have your Master Ball.
defeat all gyms,elite 4 and champion of that region to catch legendary pokemon
Of course, a Master Ball catches any Pokemon without fail, Legendary or not.
Use the Master Ball if you need to catch a Pokemon without fail. I'd suggest using it on a legendary, though - don't waste it on a common Pokemon.
master ball
You get their health really low and use a ultra ball the best
a utra ball or a master ball
Lower it HP till it turn red and keep throwing ultra ball at it.
You can't catch shiny legendary Pokemon without cheats... sorry
no
A fleeing legendary pokemon
Use A Master Ball Or Ultra Ball To Catch. But I Think It is Hard To Find Master Ball...:/
Use the master ball you get from profe elm
You have to get the end of the game and find the end place where the legendary Pokemon is waiting and you catch it with the master ball you were given earlier in the game