Not a lot of competition but honestly Batman Returns is probably my favorite SNES beat-em-up. The controls and mechanics all feel right. The enemies are really mean and aggressive but Batman can chuck batarangs for free to open them up with a stun AND he has a shmup bomb, so it plays differently but the different ideas work together. The bosses are all kind of a zany mix of action game pattern memorization and the usual sort of "approach from the Z-axis and do the usual infinite." I've beaten it a couple times and still want to keep goofing off and replaying and trying to do a clean 1cc. There's some cheap bits here and there though so maybe I'll hate it when I try for that and have to seriously grapple with them
