that depends what boss your fighting.
Blaaz
When see tarnados on ground throw bombs at they to fiy up to him and hit it.
you kill a phantom by getting the phantom sword and then hitting them in the back
One word-Bellum
beat bellum, the final boss
you hit the red butons on his body but u have to hit all of them in the in one lanch
Use it to get to the boss key and the and get to the boss.
You have to blow up the corrupted ghost ship.
Bellum is the final boss in the Legend of Zelda: Phantom Hourglass(A.K.A The Evil Phantom).
no u use a boss key
the boss guarding the aquanine is Eox, Ancient Soldier
Depends on which game and your point of view. Personally, my favorite boss is Eox in Phantom Hourglass