CHR RAM Smiley Test
To activate the CHR RAM "Smiley Test" easter egg for this game, you will need to power on the NES/Famicom console while holding Up, Down, Left, Right, B, Select, and Start. Note, however, that it is not normally possible to hold all four D-Pad buttons without specially modified controllers; standard NES/Famicom controllers will not work.
Extra Life
At the title screen, hold Left + B + Select and press Start.
Go to Mission 4
At the title screen, hold Up + Right and press Start.
Hidden Secrets
When your score is good enough to make the high score table, enter your name as 'CAMERICA' or 'MIG 29' to see hidden messages at the high score screen, or enter your name as 'DIZZY' to see a brief demo of The Fantastic Adventures of Dizzy.
Invulnerability
At the Mission screen, hold Up + B + Select and press Start. The helicopter color will change, indicating that you are invincible, although your fuel still may run out. You should re-enter this cheat before the every mission as a result.
PRG ROM Smiley Test
To activate the PRG ROM "Smiley Test" easter egg for this game, you will need to power on the NES/Famicom console while holding Up, Down, Left, Right, A, Select, and Start. Note, however, that it is not normally possible to hold all four D-Pad buttons without specially modified controllers; standard NES/Famicom controllers will not work.
Start on Mission 2
Hold the A button and press Start on the title screen.
View a Dizzy Demo
Before the title screen appears (at the Codemasters logo, or after the game over screen, or after the demo loop is over), hold Right + A + Start.
View Credits
Before the title screen appears (at the Codemasters logo, or after the game over screen, or after the demo loop is over), hold B and the credits will roll.