Character sprites in particular have been nigh impossible to obtain. Others online have posted isolated pre-rendered cutouts from certain cutscenes, but that's it. And that's not from digging into the game either. I'm fairly positive those were done by manually cutting the sprite out with Photoshop or some other equivalent programs.
The biggest issue we would face is managing how sprites are formatted. There was a corruption video on Youtube that goofed around with DtP and for split seconds, you could see how Klonoa would be broken apart like a puppet. So if we could ever rip them directly from the deeply embedded files of the game, we would have to spend even more time putting everyone together like puzzles. Unfortunately the game isn't set up exactly like Donkey Kong Country or most other pre-rendered graphics. It's far more detailed.
