is it possible to level up antiform?

I know for sure that the antiform can't be leveled up, I'm sorry. But as I usually say to that, it would be cool...

Hope I helped

Look it cannot be increased but the chance to get is calculated by anti-points.
Each time you use valor, wisdom or master form you get 1 anti-point and if you use final form you lose 10 anti-points and when you use anti-form you use up 4 anti-points.
Also the anti-form has half of sora's attack and defense but doubles the speed so equaling out the attack rate plus making you almost impossible to hit so the only the only bad side is that it doesn't give you any exp. But since you are level 99 you do not really need it.

No you can't anti sora is a form that once you trasform you can't revert enless your not it combat and if you are you'll stay in that form untill the drive gauge is empted and also what Overload said is true as well.

Sorry,but there is no way to do that.although it would be awesome if you could

actually there is, ive dun it... im just like u lvl 99 ive got all the forms and theyre all maxed out, it takes ages to do tho, and eventually ull end up gettin really frustrated: u no how with wisdom u have to kill heartless, its the same but instead of killing like 30 to get level one of it... u kind of have to kill like 500 and of course it takes a lot of time to get enough anti points to use anti form, but once u level it up its in ur form menu

based on my reaserch as well when I was finding about how to level up final form when u use valor form 2 anti points when wisdom 1pt. when master 0pt. when
final -1 when have new form reset back to zero.. thats all i know kk have fun..