Zant is an antagonist featured in the Wii and GameCube video game The Legend of Zelda: Twilight Princess where he is also known as the Usurper King. Prior to the events of the game, Zant took the throne from Midna in the Twilight Realm. His entire body is covered and you only see his face revealed near the end of the game. Despite his menacing look, he's rather childish at times and isn't the primary antagonist; that role being played by Ganondorf. In fact, Zant is considered one of Ganon's minions.
The Legend of Zelda: Twilight Princess
In the game, Zant is a peasent in the Twilight Realm who wishes that he were the king and the ruler of the Twilight Realm. Ganondorf after being exiled to the Twilight Realm appears near Zant like a God. Ganondorf promises Zant that he can make Zant become the ruler of the Twilight Realm. By giving Ganondorf's powers to Zant, Zant became powerful and overthrew the Kingdom of the Twilight Realm. Zant then steals the fused shadows from Midna and leaves her to die in the Light World but not until after using his Ally King Bulblin turns the Light World to dark starting with Hyrule Castle. Later, finding out that Midna has lived and has brought together many of the fused shadows he had placed to try to keep the Light World in darkness he confronts her leaving her weak and helpless with Wolf Link. Then, splitting with Ganondorf Zant travels back to the Twilight Realm while ressurecting Stallord and destroying the Twilight Mirror. He then lays in wake in side the Twilight Realm as Ganondorf begins his attack upon Hyrule Castle starting by putting a protective field around Hyrule Castle immediately after they parted their ways. Zant is finally killed by Midna who uses the fused shadows power to kill him. He is though later seen at Ganondorf's death cracking his neck as though somehow he may have been partly the cause of Ganondorf's death.
Super Smash Bros. series
Zant appeared in Super Smash Bros. Brawl as a trophy and sticker. His sticker increased weapon attack by 7. The following is Zant's trophy description:
"The self-proclaimed king of twilight. Zant is the ringleader scheming to cover Hyrule in twilight. Zant long served under the royal family of the Twilight Realm. Ganondorf grants great power to Zant in exchange for his allegince, and Zant makes it his ultimate goal to become the supreme leader of both light and dark."