with skill yeah
Definitely Thundurus. You can get 2 Master Balls in Black and White. You should save the second one for shinies or event pokemon.
You buy them when you beat your 4th gym
take down its health then put it to sleep or confuse it
ultra, the premier is the same as a pokeball
ultra ball
The Ultra Ball can be bought in the Pokemart later on in the game, or you find it in a variety of areas.
u can buy an ultra ball in sootopolis and then u can buy them anywhere after that
definitely an ultra ball..usually things that are more expensive are better in pokemon..although they don't entirely justify the cost!!
use a ultra/great ball
You catch them with a ultra ball
Ultra Ball
to change the ultra to master in battle, when you throw the ultra press a rapidly about 15 times and it might work like a master ball