Viewtiful Joe: Red Hot Rumble (PSP)

Unlock Alternate clothes
Finish all 40 Trial mode missions. After, press Square at the selection screen

Unlock Art gallery
Accumulate all 16 puzzle pieces in each special level in story mode

Unlock characters:
Unlock Android Rachel - Finish Trial 29
Unlock Director Blue - Finish Trial 1
Unlock Fighter Bianky and Friends - Finish Trial 13
Unlock Gran Bruce - Finish Trial 35
Unlock Heroine Silvia - Finish Trial 37
Unlock Hulk Davidson - Finish Trial 14
Unlock Manager Jet - Finish Trial 19
Unlock Movie Fan Joe - Finish Trial 5
Unlock Stylish Alastor - Finish Trial 34
Unlock Young Blue Jr. - Finish Trial 24
Unlock Young Captain Blue - Finish Trial 40

Unlock Charles
Successfully finish the 2nd level of Story mode

Unlock Dante
Successfully finish the 1st level of Story mode [all four chapters]

Unlock Special Story mode levels
Accumulate the 16 puzzle pieces for each stage during story mode