More Accessories
     These  only need to be unlocked once and they'll be available for
every character.

Back Accessories:       In Shiverpool 1, obtain 30,000 pts
Wrist Accessories:      In Pen Gu South 3, obtain 40,000 pts

Unlockable Characters
     These characters become available as stage points are achieved.

Arnold:                 Earn at least 30,000 pts in Shiverpool 2
Big Z:                  Earn at least 100,000 pts in Legendary Wave
Elliot:                 Earn at least 40,000 pts in Pen Gu North 3
Geek:                   Earn at least 60,000 pts in Pen Gu South 4
Tank:                   Earn at least 40,000 pts in the Boneyards
Tatsuhi:                Earn at least 15,000 pts in Pen Gu South 2