Viddler

The final boss fight is pretty fun. It requires you do do a ton of dodging. Although doing so could cause frustration, I have to admit that taking the boss down that easily isn't that cool... He kinda makes up for it by forcing the player to stay alert at all times and by making it sorta hard to get to the barrel with the cannon ball the first time it comes out and making it go into his gun rather than having him slap it away, but still...

Anyway, the Crocodile Isle explodes and we get the true ending to the game.