The advanced grid is exclusive to the PAL and International versions of the game. It's an alternate version of the sphere grid where all the characters start pretty much at the same location, making it possible for every character to do any other character's standard job.
Ah I see. Too bad it's not in the US version, though I like what I've got. It must be me, but lulu always ends up as one of my strongest characters, along with Auron and Tidus. This time around, I'm trying my best to keep Kimahri and Rikku relevant.
Pray to Yu Yevon. Dream, fayth. Forever and ever, grant us prosperity.