Koopa troops are perhaps the most famous and most beloved Mario enemies in the whole series. So this was neat to see Kamek use magic to make a monstrous koopa troopa for Yoshi to fight.
The battle is all about your shooting accuracy. After a couple of eggs to the face, Hookbill will start to weaken.
And then you have to knock him over for good.
And a good STOMP! And he's done with. While not my favorite boss in the game, Hookbill was pretty close to the top.