I'm trying edit a rom so classes are unlocked at the start of the game. So far, I've found an AR code that lets me do that.
5213C5A4 E5941008
0213DF38 EBFD1C64
0213DF50 EBFD1C5E
D0000000 00000000
This edits the memory locations 0213DF38 and 0213DF50 with 32-bit values, and I confirm this work...