Is Auto-Battle possible?

To work like FF4PSP's auto-battle, which is the only feasible one you'd even consider, you'd need to:
A) either sacrifice what little free SRAM you have for 14 character commands to be saved as their 'most recent' or expand SRAM for said purpose
B) hook into the regular battle routine the code to do this
C) hook in a button check to enable this. X seems ideal, but would need re-assigned as it currently doubles for Y.
D) hook in a subroutine that handles the game actually handling auto-battle; this is likely beyond my present skill, though I would probably begin by looking at Umaro's and and the coloseum/muddle code.