Personally, I found all the bosses up to Hollow Bastion to be fairly easy

They are: Wonderland, Olympus Colleseum, Deep Jungle (Tarzan), Agrabah, Monstro, Holloweentown, Neverland, Atlantica (Little Mermaid), Hollow Bastion, Traverse Town, Destiny Islands, 100 acre woods, and The End Of The World

Actually, Hollow Bastion STILL confuses me when I play the game, with that stupid elevator system and the fact that if you're outside and a Wyvern heartless knocks you off the side of the castle you'll fall all the way down to the rising

I had bought a copy of this game back at a convention and it wouldn't work as

So with Sora being the Keyblade Master, Goofy and Donald decides to team up with him to help search for the missing King as well as to seal all the worlds

Quickly I found myself confused as to where to go

So in essence, the plotlines and quest is to search for Riku, Kairi, and King Mickey as well as to seal the open Gateways

For those people who give this game a bad review because most of the gameplay consists of using mostly "X" and "O" have utterly failed to see the big picture that is offered here