a lot of things

 

Over anything, it pushed the limit of the PS2 hardware to create such an amazing experience. It used nearly all of the cache available on the PS2 to make something like that.

 

There is no other boss fight like KH2's final boss. Ever. EEEEEEEVEEEEEERRRRRRR (Sorry Terra)

Edited August 19, 20178 yr by Clouded Sun

I personally like the final boss of KH1 more.  I love how they strip you of Donald and Goofy at the beginning of the fight, leaving you to rely on your own skills as you fight Ansem once again. Next, after Ansem is defeated, you have to destroy multiple sections of World of Chaos, reuniting with Donald and Goofy along the way.  Then, by the end of the fight, you have to face Ansem one more time, and this time, since you have Donald and Goofy back, you take him down easily, making yourself feel awesome and powerful.  After all of this, you are treated to a cutscene of World of Chaos exploding.

 

That being said, while I like the final boss of KH1 more, I have to admit that the final boss of KH2 is the best boss fight in the entire series.  Also, overall, the entire ending is just way more fun in KH2, in my opinion.  When I replay the boss fights that come before the final boss fight in KH1, I am just trying to get through them all in order to fight World of Chaos again.  The boss fights that come before that one, (with the exception of the one-on-one fight against Ansem on Destiny Islands) are just forgettable to me.  However, in KH2, every boss fight leading up to the final boss fight is not only memorable, but fun to play.  So, while I like the boss fight against World of Chaos the most, I have more fun playing the end of KH2.

Edited August 19, 20178 yr by Dagesh Lene