Zone of the Enders: The 2nd Runner Cheats

Whenever you see two people (EX: Ken and Dingo) during a cutscene (not the anime ones) you can move the camera with the right control stick. To move the other camera, hit R2. The left control stick moves the camera.

After you get the WISP subweapon, grab Ardjet and take it down to the lava until Ken says something. Do this several times. Once you beat the current mission, Ken will have a new costume in the next anime cutscene.