Quote Originally Posted by LunarWeaver View Post
If you're asking if Sora can move his hand with force and connect his knuckles with someone's face I'm sure he can. But that hand of his is no keyblade of course .

If you're asking if in the game you can get rid of his weapon and fight without it during the battles, then no.
That sounds about right. About the first question, though, Sora went through parts of the Hollow Bastion with a wooden sword in the original KH. Although he couldn't physically do much damage at all, he still kept all his special abilities, such as being able to fly (or glide), jump high, use magic etc.