Unused sprites in BB Gun catacombs map?

[TheouAegis]

I was trying to rip and organize the background sprites for Ball Bullet Gun on the SNES. I noticed in the catacombs tiles there appear to be suits of armor. However, I haven't noticed any suits of armor in the game. Anyone seen them used at all? I'm trying to figure out which color scheme they use. There might be other "unused" sprites but those are the only ones I've stumbled upon so far.