A couple of questions

1. Is it possible to make a Undo skill via eventing? Undo would be where all damage and status effects inflicted on the last turn are undid.
2. How will I make a Final Fantasy Tactics Advance style Control skill? Basically, it'll be several skills, one for each type of monster say like Control Cloud, and Control Avian. Where you basically be able to control the speficic type easily. I just want it done, a way to make sure it can only be used on the revelevent type is optional.

mmmm for the first question, i would suggest script. Eventing...it would be possible........ but you'd basically have to set up a whole battle system using events since each turn would have to be recorded some how, mostly by variables, and then a skill would have to be linked to it recognizing specific variables to undo or erase within the battle. Complicated...

for your second question, there's probably a TBS out for XP. i don't know too much about scripts and stuff of XP anymore, i know there's a couple for VX tho. TBS, as in tactical battle system.