Like I said, there is no plan to create a unique BRICS currency. They will just start to use each other's currencies

also: China has strict monetary controls, you can't take your Yuan out of China for instance, so they will not allow for a BRICS currency that they can't have similar control over.

BRICS don't vote like the UN does, they all have the same "vote" (one) and no country has more "say" than another. They also don't have a veto like the UN does.