yes
One, although if you have the AR cheat, 999 masterballs can be acquired.
Action Replay (AR) you get 999 of them
i dont even know
cant have infinite, but you can have 999 of them
there is no such code
That is actually the code to put platinum into Your AR.
egejfhefherjkfherjfkhfjdshsjfskjfhskdlfhskfj
no
Im not sure if there is a code like that for platinum but maybe im wrong.
no cheat for platinum
There's no Action Replay code for a Keldeo in Pokemon Platinum. Try asking for Black and White.
It is obtained from a Nintendo event in diamond, pearl and platinum or an AR (action replay).