its easy all you have to do is lower its UP points in till it gets to red and if you did that try to make is sleep or burn but making moltres sleep is easier.
note:making it sleep or burn is not just work for that Pokemon it works on all Pokemon
a ultraball or a master ball
you dont have to you can just catch him witha master ball you get from silph co.
Weaken him until he's almost fainted, and then inflict a status (sleep preferably, but paralysis, and freezing also work) upon him. Use a ball with a high catch rate (ultra ball, and great ball work well).
Since Moltres is found in caves, Dusk Balls are very useful and I myself caught it with a Dusk Ball, but an ultra ball is well too, and a mster ball, if you chose to waste one you cannot replace without cheating, is the best choice.
no
I'm not quite sure what your talking about, but I would have to say that you would not have to catch it in a Master Ball.
You should have used a dusk ball. LOL of course its bad......Master ball should be saved for a powerful roamer like Zapdos, Moltres and Articuno (yes, you can catch them in platinum without migrating via Pal Park and with no cheats).
Yes
It's not hard just damage the moltres that he has little HP left. And then use a ultra ball.
you need to have two master balls.
You can catch any legendary Pokemon with an ultra ball as long as you get their hp down and you have to have a lot of them. Try to put it to sleep or paralyze it to make the catch easier.
To catch an articuno with an ultra ball you have to lower it's HP and put it to sleep... To catch a moltres you only have to lower his HP then use an ultra ball... To catch a zapdos a master ball is required... Or you could get a gameshark!