Final Form is white. It moves incredibly fast and your drive selection menu should say Final in it if you got it. Final you have to kill Nobodies. I personally leveled up at TWTNW in the areas right before the Altar of Naught. Master, you have to collect the yellow drive orbs. Big ones equal 1 exp and big ones equal 3. This is explained in the status menu if you go over the Experience counter. I leveled up Master at Land of Dragons in the Antechamber which is before the Throne Room.