Animated NES CHR Banks
To create animated background elements in late-era NES games, developers used a technique called "bank switching". By rapidly swapping certain chunks of graphics data in and out of memory, while the coordinates of said graphics elements are rendered on-screen, it creates a convincing animation effect. Here I've assembled those graphics banks into singular images, colorized them, and animated them into GIFs.
(Inspired by a tweet by @eggboycolor)
THE KING. The water and moving chains on the bottom-right are unused, along with some of the flashing lights on the left.
The bubbling lava tiles on the left are unused.
The moon tiles aren't consistent, but the graphics don't animate in the part of the level where it appears, so you wouldn't notice it.
The Japanese verion, Solbrain, has a different level. Its unique tiles are stagnant, whereas they're aniamted in Shatterhand.
The two filler blocks (one in top-left corner, the other filled with X's) were left grayscale. The jutting pointy platform on the right is unused.
I believe the treasure chest is unused, and I didn't see a suitable palette, so I left it grayscale...