Omega Five

Just beat the third stage of the game with any character in arcade mode. If you are using the character Ruby, the mini-bosses will be a piece of cake. Simply lock on and concentrate on dodging.

Other characters will need to wait and fire in short bursts to avoid being shot. During the boss fight, you should use a spread-weapon to hit the core and the falling debris. The mini-boss will attack with its saw to one side first, then the opposite next, before rotating and attacking anything in the center. Stay to the sides and shoot upwards constantly to avoid the debris. The mini-boss will eventually move to the top of the screen. Begin to fire on the debris coming from the bottom then fire on the core. The boss will rotate again and go back to the first pattern.