a master ball!!!
In Pokemon ruby you can catch latios but not latias, in Pokemon sapphire you can catch latias not latios, in emerald you can choose. Use your master balls on them so they wont fly away. You can use other types of balls, eg timer ball, ultra ball, or great ball on the other legendaries.
Just use a love ball with a Male pokemon.
NONE!! Except for the master ball. i have heard that luxury ball can also be used like a master ball on latias comment but i have wobbufet as my first pokemon,then i found a latias,then i caught it with two ultra ball...
brug timer ball
You don't need a master ball to catch Latias. Use a Pokemon such as wobbufet who has shadow tag so he cant escape. Eon tickets are obtained only at Nintendo events.
Pokemon ruby/ sapphire/ emerald= latios/latias. Pokemon diamond/pearl/platinum=cressila.
You can catch any Pokemon with any ball it all depends on luck.
you can use master ball in caught the groudon
With an ultra ball or master ball in sky tower. The name of it is Rayquaza :)
If you have already beaten the elite four and have Latios or Latias already roming around in emerald then you can chase it down till you are in the same vicinity as it and go into the grass to see it appear. toss a master ball at it and you will have the latios or latias. Of course it's best that you clone the master ball first so that you can catch the other one the same way.
You can't do it quickly or with a master ball
After you beat the Pokemon league, you go back to your house, and your mom asks you if you saw a report on TV. Then she asks you what color the Pokemon was, red or blue, and your answer determines which one you catch. Red is Latias and Blue is Latios. Then you walk around and randomly run into it and catch it with a master ball.