When you’re not fighting Akrid, you can fight each other in E.X. Troopers. Capcom announced a 2-on-2 Battle Technique Tournament mode where you can test Bren’s Vital Suit piloting skills against other troopers.
Each base in E.X. Troopers has a different unit to fight. Here are the characters from Tek base:
Bratt uses a homing missile launcher.
Ein uses a plasma grenade launcher.
Surge uses a flame launcher.
Bell has an ice grenade launcher.
E.X. Troopers comes out on Nintendo 3DS and PlayStation 3 on November 22.