Space Bomber

after you put your credit in...:
Play as light blue ship - Right(x3), Left(x3), Right(x7)
Play as Tetris block - Up(x3), Down(x3), Up(x7)
Muchi Muchi Pork

at the title screen...:
Unlocks Harahara mode A, B, Right, Right, C, C, Left, B, Left, A, A, Up, Down. After entering the code hold Down and press Start to start the Harahara mode.
Unlocks Manpuku mode Right, Left, Left, B, B, B, Down, Left, Up, A, B, Right, C. After entering the code hold Up and press Start to start the Manpuku mode.