The Department Store in Lilycove has a lottery each day. The grand prize is a Masterball, however the odds of winning it are extremely low.
you clone your Pokemon at the battle tower by going to the PC and ....
From the store
action replay
no
you can use a game shark to get unlimited master balls
Master Code: D8BAE4D9 4864DCE5 Buy Master Balls Code: 82005274 0001
No. However, you can clone a Master Ball on Emerald. There are also codes to get multiple Master Balls.
one
1
You don't.
you have to clone that Pokemon holding a master ball
There is only ONE I believe.