[VX] Assist Skill

[digdarkevil]

Hello Everyone!
In The Game I Am Working On, I Would Like To Make A Skill That Change If A Character Is In The Party. But This Character Is Not A Battler So I Was Wondering How I Could Do This Since I Am Using SBS And I Dont Know How To Add A "Assist-Only" Character In Battle. Maybe A Script Is What I Need So This Is Why I'm Asking Here.