Play as Hiro 2:
To play as Hiro 2, at the character selection screen, highlight Hiro, then press Start, Up(2), Down(2), Left, Right, Left, Right, Start.
Play as Jado 2:
To play as Jado 2, at the character selection screen, highlight Jado, then press Start, Down(2), Up(2), Right(2), Left(2), Start.