Random Questions I have and things I want to do

Do you have advice for coding in SNES assembly language? What are the most salient points, the worst limitations, and the areas most prone to errors?

Your best friends will be a good 65816 reference doc (something like this), the RAM maps and different disassemblies, mainly the $C2 disassembly for the battle system. Maybe also something like a SNES registers list can be helpful. With these you would be all set for 90% of your hacks.

You can do whatever you want with 65816, the cool hacks will come with practice and knowledge of the game.