Final Fantasy Hacktics

I've been searching but it seems that the search function is remarkably vague.

So, there are weapons with Elemental qualities and then there are weapons that will cast a spell when used. Is there a way to make a skill give other characters a similar thing in battle?

I think I have seen something like this in other mods but it seems it is usually a target self ability. I want to make an ability that grants all allies a specific Elemental attack.

Elemental attacks are granted via the weapon's properties, and the weapons that cast spells are hardcoded to do so via the weapon's damage formula, both of which you can view in the patcher. Editing the latter requires asm hacking. Granting either of these bonuses to other units isn't possible, at least in any reasonable sense. Jobs have stats for elemental absorption, cancellation, halving, and weakness, but nothing for their outgoing attacks. And by default, individual unit data doesn't have any free space to hold a byte for elemental attack type. It is an interesting idea though, but I'm not aware of anyone having done it yet. Double check the hacks included in the patcher to see if you can find something similar.

Interesting...well thank you for that. I'm mostly making unique classes for each of the unique units that don't really have one. For Ramza, I'm creating his Squire class to be a Zodiac Knight and his abilities are based on each Zodiac sign. Rad, is becoming a Mercenary with break and Squire abilities. Lavian, is going to be a Aqua Knight with ice and water based skills. Alicia, is going to be a Terra Knight with Earth and Lightning based skills.

I was going to have one of Ramza's abilities grant all allies fire attacks, but seeing as that may be impossible, I will have to think of something different for that sign. Maybe PA & MA up or Bra/Fai up.

Mystic Knight functionality could theoretically exist, but it would require doing something like getting rid of the byte on the Battle Stats that marks whether a unit is holding a sword-type weapon and/or a Materia Blade (functionality that the Ability Requirement Hack already bypasses anyway) and using that as a special weapon elemental byte, then editing all of the weapon formulas to check that byte first before checking the weapon.