Which of these celled MAGs is better, and how do you use a C

[Woggy]

okies, I have a choice of getting pretty much any MAG cell I want and want to know which MAG is best out of: Pitri, Preta, Pian, Chao, and RoboChao.. and also, HOW do I use the Chao or RoboChao cells? What are the requirements? I tried using both on my MAG, but both had the "use" button greyed out.

[Woggy]

Oh, and when I say "better" I mean like what bonuses it gives (ex: casting resta, making you invincible).