Quote Originally Posted by Agent0042 View Post
I thought the "Only Sora can deal killing blow" requirement was only active in Kingdom Hearts II... Or maybe that's just the "finishing move" requirement that was added.
In KH1, only Sora can deal the final hit to defeat a boss. Any move that did damage would work.

In KH2, Sora is the only one who can deal the final hit to a boss as well. However, regular attacks do not work. Finishers are probably the most commonly used, but Limits, Magic (except Magnet), Reaction Commands (that deal damage), and Horizontal Slash can also defeat a boss. Maybe Summons also work.

Basically, you simply can't use a regular keyblade attack to deliver the final blow to a boss in KH2.