Ok for those that want information from the scans here we go!
Sora vs Vexen
When enough data from Vexen is captured, a copy/replica of Sora is created, and must be battled with. When Vexen encages you in an ice, you need to tap Triangle as fast as you can to break out of it.
The Data, is like a Drive Guage, the max it can go is "5".
The Replica takes in the shape of the Anti form, and you must do battle against it. This battle is very challenging, and it is required and needed that you attach an ice resistant item on to last through it.
Sora vs Larxene
For the match against Larxene, it is just a simple of taking out Larxene, who seems to have around 5 bars, however due to her moves they make it much harder, the moves consisting of the following.
1. A circle of thunder causing Sora unable to move, and then moving into attacking.
2. A thunder tornado that does alot of Damage, if Sora is indeed hit by it.
Sora vs Zexion
This is a special case, as all Sora needs to do is enter a special book that will take him into a World of Shadows, this is when he will be fighting against Zexion, who will only use tactics in this battle, and not really fight himself. (ARG That hurts)
In part of the battle, Donald and Goofy will be confined in books, and Zexion will also hide himself in one of the books. You have to find the right book in which Zexion is hiding in, the right one will have a shadow on the ground.
"Turn it over" is the reaction command mainly needed to knock Zexion out, but there are others like "Lie" and "Cheat"