has it been explained yet what's going on with the bottom screen? I figure GMUN would probably know something like that. Looks to me like all your attacks you can use in a single battle are down there and you have to manage what to put down there to make it through a battle.
--
http://i.imgur.com/A63VR.gif
http://www.yourgamercards.net/trophy/a/CaptainRockman.png