The working name for that hack is "It's Palom's Fault".
For instance, a battle script from the "cloned twins" would something like this..
Palom's Script:
If Porom's in the party, cast Break on Porom.
If Rosa's in the party, set up special stats.
1) Cast Bio on all targets and end turn.
2) Cast Flare (twin spell) on all targets and end turn.
3) Execute Bluff command and end turn.
Repeat loop.
If self has Mute status, cast Quake (monster version).
Porom's Script:
If Palom's in the party, cast Mute on Palom.
If Rydia's in the party, set up special stats.
1) Cast Cure3 on all allies and end turn.
2) Cast Comet on all targets and end turn.
3) Execute Bluff command and end turn.
Repeat loop.
If self has Mute status, cast Remedy (full healing) on self and cast monster Esuna on all allies.
Note: I'd have to test if Bluff works on them....
We have EVEN MORE themes now, but some old ones are gone...