Use these at the Figure Vending Machine in Access Tunnel E-1.
You can attempt to complete these challenges as the game progresses whenever you want. You can view your unlockables by going to the Sky Room, which Nana will transport you to after Chapter 3.
Go to a place where you can battle a Preon Nurse. Destroy all enemies EXCEPT the Preon Nurse. During the Preon Nurse's turn you'll see a message that says "Preon Nurse surrendered" and it WILL execute an All Life Gain 25 to your active party formation.
There are a couple of secret areas you can get to by deploying mechanaloids to certain areas. Here's the areas.
These are Extra Hyper modes of X and Zero. They are very strong! and will make the game easier. Before you do this make sure you have the Medal Key and the Tianna Key. They can be acquired by Deploying Mechanoloids in The Tianna Camp and The Medal Ore Plant Areas. once you have them make sure you follow these instructions.