This is a list of the codes used for hacking save states in Spike McFang on Zsnes; If you do not yet know how to hack save states, click here for an explanation.
If a value has 3 digits in hexadecimal, put the first digit in the second spot in the second location, the second digit in the first spot in the first location, and the third digit in the second spot in the first location (the first spot in the second location should be a 0).
166A-166B = Money
166C-166D = Experience to next level
166E-166F = Current experience
I couldn't for the life of me figure out anything else. It seems it has a strange way of storing information for the HP and cards. If you can be of any help, email me here.