Viewtiful Joe Double Trouble - More cutscene glitches

Just downloaded the new Desmume version and the cutscenes for the game now display correctly. However, there are some graphical shadowing texture glitches mostly happening on just one character, and as far as I know, only in the ending.

Here's a save file at the last boss (last save, 6-11) and a cheat with invincibility.
https://www.sendspace.com/file/o81idk

It's real easy, just punch and kick the boss, you can hold L to make the action go slower and get more hits. Once you drain one energy bar, you need to slide the screen up with the stylus and touch the 4 boss mirages. Repeat 2 more times.

The glitch in question is this:

Notice the dark/shadow texture on the arms and face.

In one scene it looks wrong, but in another scene it looks perfect.

There's also a dark effect covering half of the faces sometimes. I think this effect is correct, just not for half the face. In other scenes you can see the effect, but it doesn't cover half the faces of characters.

No source file, test, or entry point is identified. Start by reproducing the ending with the linked save file and invincibility cheat, then compare the affected scenes and screenshots. Done means the shadow textures and facial dark effect render consistently without covering the wrong parts of the characters.