What you have to do is have a Pokemon that can make it have a condition first (paralysis, poison, etc.). I recommend sleep. Then you buy a lot of ultra balls. (99 is recommended) Get the Pokemon down to red hp, use the move that does the condition, then throw the ultra balls until the Pokemon is caught. I do this with all legendary Pokemon except 4 the main one like dialgia palika and others and enjoy catching without master balls!
a ultraball or a master ball
you dont have to you can just catch him witha master ball you get from silph co.
No, you can catch Entei without catching Moltres.
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
It's not hard just damage the moltres that he has little HP left. And then use a ultra ball.
catch Zapdos or Articuno
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
No.
Moltres's catch rate is 3, which means you'd better bring LOTS of balls.
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).