Here are some cheats and tips for the game Parodius.
All items:
Pause game play and press B(2), X(2), A,
Y, A, Y, Up, Left.
Invincibility:
Pause game play and press L, R, Up, X,
Right, A, Left, Y, Down, B,
A, Y, A, Y, R.
Three smartbombs:
Pause game play and press X(3), B(3), Y(3),
A(3), L, R.
Disable cheats:
Pause game play and press Up(2), Down(2), L,
R, L, R, B, A.
Level select:
Press Up, Right, Down, Left, X,
A, B, Y at the options menu.