How do you defeat King Zant?

Zant is pretty easy to kill. You fight him after you get into the twilight temple I gues is what it's called. He takes you through almost every other room that was used in a boss battle. Just think back to what you had to do to kill the boss that went with that room and it's usually similar to that.

You have to use the same stradigy that you used on the boss of that temple you are currently in. Like the first one is the forest boss. Use the boomarang to brind him to you. Then slash him. Then use the arrows, so on and so on. He will at some point die. And that is it.

You fight Zant in six phases.

Stage 1: Forest Temple Boss Room
This is actually fairly easy. Throw your boomerang at him to bring him to you, then slash away. Repeat as needed. Oh, and hold up your shield so you don't get hurt by his projectiles.

Stage 2: Goron Mines Magnet Arena
Use your Iron Boots in the middle to stay balanced while Zant jumps up and down to knock you off. Once he stops, he'll either shoot at you again (hold up your shield) or he'll be dizzy (I'm not sure which). Take off your boots to run up to him and attack. Repeat.

Stage 3: Water Temple Boss Room
Zant starts by hiding in a giant version of his helmet. You start out by wearing your Zora Tunic and Iron Boots. Then when he opens the mouth part, you can jump to the side to avoid his water-slowed attack, then draw him over to you with the Clawshot. Slash away. When you do it the second time, he'll be in one of four helmets--find the one he's in, then repeat what I said earlier.

Stage 4: Forest Temple Baboon Chamber
The Usuper King hops along atop the pillars, just like the baboon before him. Roll into the one he stops on twice, then attack him. Easy enough. Oh, and it may be a good idea to use the Magic Armor when you get annoyed that you can't get through his projectiles.

Stage 5: Snowpeak Ruins Boss Room
Run away from Zant's reflection in the ice, then use the ball and chain on his foot when he misses you. He'll hop around, holding his foot up. You close in for the attack. Luckily, no annoying projectiles this time.

Final Stage: South of Hyrule Castle Town
Zant seems surprised that he brought you here. However, this does not stop him for too long. Now it's a one-on-one sword fight. Zant uses three attacks--an easy to defend frontal assault, an impossible to break through spin attack (that leaves him dizzy at the end), and a manic slasher attack that is similarly hard to penetrate. The latter two are designed to push you into the barrier around your fighting arena--do not touch. The first is his first, and you can get a lot of easy hits when he does it. Keep your shield up for the second and third attacks, and jump around him. The backslice is an easy way to get out of his way.

Remember, this is just a loose guide to what he does and one way to beat him. It's more or less what I did, and it didn't take me too long.

You can do it.