Unlock Reina:
     At the title screen, press Up, Up, Down, Down, Left, Right, Left,
Right, B, A.

Unlock bonus characters:
     Complete story mode with Go to unlock Sieg Hart.
     Complete story mode with Musica to unlock Read Admiral.
     Complete story mode with Haru to unlock King.
     Complete story mode with Elie to unlock Pasha.
     Complete story mode with Shuda to unlock Gale.

Unlock Beast King:
     Beat  Story  Mode  on  Hard  using Haru without continuing. After
round  7  King  will  change  to a Beast, beat him to unlock The Beast
King.