No, not 'the end' of the game... I'm referring to that most powerful of garment grids, one I've not yet acquired.

This one's only accessible if you manage to fill in every blank space on Shinra's bestiary - basically, you have to fight every monster in the game, including oversouled forms, where possible.

Apparently, activating every gate on the grid allows the character to use an ability called "Finale"...

I'm wondering, as anyone managed to get this garment grid?
What does Finale do? I'm assuming it's something like "The End" from FFVIII...