Complete the indicated task to unlock the corresponding alternate costume for the listed character. Switch to the alternate costume by highlighting that character at the selection screen, then press Triangle.

Amuro Ray: Complete all five story missions in Mission mode as Amuro Ray.
Char Aznable: Complete all five story missions as Char Aznable.
Haman Karn: Complete all five story missions in Mission mode as Haman Karn.
Laura Rolla: Complete all five story missions in Mission mode as Loran Cehack.
Zech Merquise: Complete all five story missions in Mission mode as Milliardo Peacecraft.