I found this back a few years ago, vSNES is a great save state hacking tool for SNES games, what you do is save a SNES save state and then open it, you can see the memory addresses, graphics, and some of the ASM data being executed in the CPU during that save state moment, it could be useful for hacking or even finding more beta stuff.
It's a little bit old, but it works just fine.
http://www.romhacking.net/utilities/274/