Defeat the FINAL Ganon
After Link defeats Ganondorf in the tower, his relief soon fades as the King of Gerudo thieves makes one more wish on the triforce of Power. He transforms himself into Ganon - a creature that reflects the true nature of his heart. With a mighty blow, he knocks away the Master Sword from your hands! A ring of fire now encircles the battle field making it impossible for you to retrieve it.
Quickly, and carefully aim a Light Arrow into Ganon's eyes. Once he's stunned, go behind him and use the Megaton hammer to hit his tail. You must repeat this process until the circle of fire subsides. When the moment comes, run to the Princess who has retrieved the sword for you! Note: The Big Goron Sword is useless in this final fight so make sure you equip the Master Sword.
When fighting the mutated Ganon, simply bumrush the evil villain and proceed to slash violently at point blank range. It's very important to make sure Link is facing Ganon's belly at all times as he constantly turns. While swinging away, don't worry if every blow is deflected; eventually, Link somehow sneaks a few cuts behind Ganon and actually hits his tail (his only vulnerable spot). Most of the time, Link will completely pass through Ganon providing easier access to his tail (just remember to keep slashing!). Only a few successful hits are needed to finish the job. As Gannon falls defeated, the Princess Zelda will put a temporary restraining spell over him while Link delivers the final blow! Then, enjoy the final animated sequence - you've more than earned it!