Well, I didn't say anything about buckteeth, so I can't speak to that charge. =P
But yeah, going off that middle picture in particular Dark and Divine posted, I get an icky "bug vibe" feeling every time I see that shot. Have ever since the movie came out.
Simply put, Kingdom Hearts' variant. Specifically Kingdom Hearts II's version, as Cloud's appearance with the other wing really helps seal the fact these two were cut from the same thread.