Then I shall make you see... That your hopes are nothing. The following content is an opinion. Do not allow it to offend or cause problems, such as flame wars. These opinions are also not the official opinions of Kingdom Hearts Answers, which can be taken to be a neutral point of view.
I say it is a tie between Riku and Data-Roxas. In both games the second-last boss is much harder. AkaAxl 18:35, January 3, 2013 (UTC)
I've always thought that the World of Chaos from KH I, was extremely easy. I haven't played Re:coded though, so I couldn't judge that. Timelinesplitter 13:23, January 4, 2013 (UTC)
There is a tie between Riku from 358/2 days and Xemnas in KH2, but I think Xemnas was the easiest final boss for me. Yunie X (talk) 16:20, January 5, 2013 (UTC)
Hmmm, the only games I've finished so far are KH1 and 2, so it's either Xehanort's heartless or Xemnas... I'd have to go with Xehanort's heartless. 22:47, January 5, 2013 (UTC)
For me the easiest final boss is Final Xemnas because after you learn his tactics, it's pretty easy to beat him.