SBS:
Snowy is right. If you used my drawing and claimed it as your own, it would be stealing, I'm afraid. So, if you used Disney's drawing, it's also STILL copyrighted to Disney. Just because they are a huge corperation, doesn't make it right to say you own something that belongs to them, no matter what you'd done to it.
Ontopic:
I think Kopa is a cute character and while he might not have been made my the artists who made TLK or TLK2, he's adorable and I like his storylines, so I use him as if he was a canon character.