Menu
Gokujou Parodius
Invincibility:
Pause game play, then press A, Y, A, Y, L, R, L, R, B, X, B, X, B, X.
Level select:
Press Up, Down, Up, Down, X, R(2), Select, Select at the character selection screen. A sound will confirm correct code entry. Select a character and the level select menu will appear before the game starts.
Difficulty 8:
Press Up(2), Down(2), Left, Right, Left, Right, B, A at the option screen.
Suicide:
Pause game play, then press Up(2), Down(2), Left, Right, Left, Right, B, A, Start.
Additional continue:
Pause game play, then press Up(3), Down(3), Left, Right, Left, Right, Left, Right, B, A, B, A, X, Y, X, Y.
Sound test:
Press Up(6), Right(6), Select(6), Down(6), Left(6) at the title screen.