I believe they removed Animalities from the SNES version, due to space constraints. They threw in Brutalities to make up for it... brutalities didn't use any extra graphics so it was easy to just throw them in.

That makes me wonder... did they leave mercies in?

From what I remember, I think Mercies were left in, but Animalities were left out of the SNES and Genesis versions.

I remember seeing a Mercy performed on the SNES version, but I was never able to do one on the Genesis version.