About desperation moves...

Ok, I should clarify. In order for any enemy to have more than 16 bits of HP, you have to put "lives" in their script (i.e. when their HP falls below a certain threshold, bring them back to life). Typically, this is put in the reactive half of the enemy script (after the first FF break), which is checked every time something hits the enemy in question unless the attack has "prevents final counters" property (X-Zone, Cleave, Snare). Desperation attacks seem to have this property hard-coded into them, which can cause problems with the scripting tricks mentioned above.