First,you need about 100-200 ultra balls
then when you have about 0-5 left use a timer ball and it will NOT fail so it is basicly a master ball it gets better when u have more battle turns so chuck most of ur ultra balls and then use a timer ball and You have a Master timer ball!
...or...
you could just press A, B, and Select at the same time while it's in the pokeball and it increases the catch rate to 85% (that's a lot easier, isn't it?)
try to catch a suckish one...
you cant
doggy biscit
the starters have been released on the maps of pokemon indigo on this newest ver so you can catch them quite easily now
Use your master ball.
throw a master ball
You can't catch shiny legendary Pokemon without cheats... sorry
Use false swipe to weaken to 1hp, then afflict paralysis.
In the Mirage Tower nefore you get the Fossil
Migrate or cheat are the only ways.
grow a pair... and get good pokemon to get the legendary pokemon's health low... then use an ultra ball over and over again until you catch it
is more easily to catch a bidoof and then using cheat for infinite rare candy level upping your pokemon.=)