How do you use special beam canon on dbz devoultion?

To use the Special Beam Cannon in DBZ Devolution, you first need to select the character Piccolo or a character that has the move unlocked. Once you are in a battle, charge your energy by holding down the attack button until your character powers up. Then, release the button to unleash the Special Beam Cannon, aiming it at your opponent for maximum damage. Keep in mind that this move requires precise timing and positioning for effective use.