I'm pretty sure you need all of them in the National Pokedex to be a Pokemon Master. I'll bet you they just used 'Pokemon Master' as a ploy for random kids to beat up animals by using animals.
you don't need the master ball for any Pokemon but i would save it for ho-oh lv 70
Doesnt need a master code
You need an action replay or have your friend put a master ball on a Pokemon and trade Pokemon
you need ar
You need the Master *** Rank.
you need to buy a master ball or find one you cant make a master ball
For this you need 1 Pokemon that knows thief, 1 random Pokemon to hold a master ball, and a ditto. have ditto and the Pokemon holding the master ball go into a double battle. make ditto change into the Pokemon with the master ball. now switch that Pokemon with the Pokemon that knows thief. have that Pokemon use thief on ditto and win the battle and viola! you now have 2 master balls!
ACTION REPLAY
you need an AR cheat to do that.
No but you can if you want to but its stupid
you need action replay 4 that
Yes you can but to get two you need to trade for a Pokemon that holding a master ball. Hope I helped.