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.
to catch suicune,mewtwo,raikou and entei
Using a master ball
Too catch raikou you must first get rock smash and teach a Pokemon the move. then you go to burned tower in ecruteak and navigate it. fall through the hole and walk forward and you will find the 3 legendary dogs they will run. then get the strongest repel possible and duplicate a master ball when you find it catch it with the master ball
If you can't catch Raikou with a poke ball, great ball, or an ultra ball,.. try catching it with a master ball. it may be very expensive but once you catch Raikou its worth it .
No! Get him in red and put him to sleep
get a high level Pokemon that can use mean look ,mean look keeps a Pokemon form running away or flieing.
if you could buy a master ball on soul silver i wouldn't have accidentally killed raikou. NO! you can not buy a master ball. and i got a critical hit with quick attack and that is how i killed raikou.
no it won't be holding a master ball cos when you used the master ball to catch a certain Pokemon, the master ball will be gone in your inventory because it is a consumable.
A master ball can catch any wild pokemon.
No.
A master ball ,ultra ball or fast balls etc.NOTE:Raikou flees a lot
No. You should use your masterball on a wandering legend like Raikou, Entei, or Latias.