http://himeworks.wordpress.com/2013/03/10/permanent-states/Tsukihime has a script that can grant you permanent states. But these are only things that will work at the beginning of a battle. If you use any skills in your game for calling up a certain item or character midway through the fight you will need an alternative mehod which I provide in the tutorials section for Script-free autostates.
But download his script. It's great and very versatile for all sorts of things;
Class, items, armor, etc
Thanks.http://himeworks.wordpress.com/2013/03/10/permanent-states/
Permanent states work the same as normal states except they have different remove conditions.
You're probably thinking auto-states.