FFVI Worlds Collide

But of course, Terra's esper form would need a male equivalent for when a male character ends up with the Morph command. Take Terra's esper sprite and modify the sprite to have short hair with a male torso.

Or Morph could turn the user into a moogle, kupo.  


New commands can be created, but they have to be applied over existing commands.  This is because monster commands share the list that player commands do, and they don't play nice with menus.  It would take an exorbitant amount of adjustment to the battle engine to change a command beyond Magitek into something usable by the player, which is why it might be better to steer clear of that.

That said, Possess is a pretty useless command that is easily overwritten, and Health and Shock are easy to tweak.  There are a also few commands floating around this message board that can be swapped in for existing commands, such as one that works like Cover from FF4.
There are also some relic-upgrade commands that could be separated to give more variety to that list, such as Capture, Jump, GP Rain, Control, and X-Magic.

Actually, Possess is the most broken command even. It can instantly kill anything, including bosses and the final boss. The user would reappear on the airship after being forcefully removed from the party after using Possess. Hence the reason why the ghost characters are unlimited. They are just kick out of the current/active party and need to be place back into the party manually.

I would rather see the Morph command stay true to Final Fantasy VI, being able to transform into an esper at will for the base randomizer. This however doesn't rule out the possibility to have an option to randomize the Morph sprite (esper Terra form) into a random sprite either.

An all character turned into Moogle option would be better, would love to have a full roster of moogles take on Kefka or whoever ends up the final boss if final Kefka gets randomizes eventually.

Being able to use Magitek armors at will would be nice, maybe an Magitek armor mode.

Add: Just remembered, there's also the Summon command and a fix to make it function normally.

I remember seeing a day/night cycle patch in the works, would be interested in seeing that implemented into the randomizer eventually down the road.