Boabin

Boabin is a recurring villain appearing in 4 boss fights and teh credits of the game. Boabin is also known as King Bulblin the leader of the Bulblins. During the first phase of fight #1 you will fight him in Hyrule Field you need to get close and slash his armor off. He will be riding his bullbos and you'll be on Epona for the games first intense sword fight. After you slash his armor off you'll go to phase 2 taking place on Eldin Bridge you'll have a jousting match he is very vulnerable to spin attacks just be sure to get out of the way of his charge.

Your second encounter with Boabin is when your escorting the carrige to Kakrioko Village, he has camped out on the Great Bridge of Hylia and will engage you in a second jousting match the only difference is he bought to arm shields so the sword techniques wont work but you have new equipment so shoot him with the Hero Bow twice to knock him into Lake Hylia.

The third fight with Boabin occurs right before Arbiter's Grounds in the Gerudo Mesa. He will be on foot this time wielding a giant axe. Slash at him after an axe swing (be sure to dodge) and soon the fight will be yours. He will once again retreat but this time will set the room you fought in on Fire so escape using a Bullbos.

He holds the key you need to get into Hyrule Castle so you'll need to kill him to get inside. THis fight is identicle to the Gerudo Mesa fight except this time he finally gets tired of losing to Link so he gives up fighting Link and the key he holds then he will leave Hyrule Castle never to be seen again.