You get their health really low and use a ultra ball the best
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
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
Weaken it to as low HP as you can, spam Super Balls at it and hope it succumbs. There is no way to easily catch a legendary without Master Balls, hax or incredibly hard work.