Kingdom Hearts II What can Limit form do?

I just have a question. I know Limit form can use Sora's abilities from the First game, But how do you get them? On second thought, How do you get it? And can you use it against Sephiroth? Please answer, because i'm Importing KH2FM+, and I want to be prepared for it.

 

The easiest way to use them is by using your shortcut menu (L1). You get it on your second visit to Twilight Town & yes you can use it against Sephiroth or any other boss without the need for teammates.

 

Shouldn't this be on the KH2FM forum?

 

You get it after you get Oathkeeper.

the four limits replace all your magic. If all four of your shortcut buttons have Magic in it they will be replaced with the four limits If you have Items instead you won't be able to shortcut limits until later.

Limit form does not require and party members, so you can use it against Riku, Roxas, Luxord, Xemnas, and Sephiroth (I may have missedsome battles but you get my point).