Cosmic Gate Codes

Code	Effect
Up Up A B, at Pause Screen	Become the powered up form of Infinity, can only be used one per game
Down Down B B A A Start, at Title Screen	Hard Mode
Left + Start Simultaneously, at Game Over Screen	Lets you continue the game but with 000 Score.
Up Up A A B B, at Pause Screen	Ship Power-Up

Haggle Man 2 Codes

Code	Effect
Hold Left, press Start on Game Over screen	Continue from level you died on
Up Down Up Down B B A A on pause screen	Full Power
Down Up Down Up A A B B on pause screen	Scrolls Appear
Hold A, then press Up Up Right Right Right Down Down Left Left Left on title screen	Stage Select

Haggle Man 3 Codes

Code	Effect
A B A B Left Right Left Right	99 Lives
B A B A Right Left Right Left	9999 Gears
B B A A Left Left Right Right	Warp to boss

Haggle Man Codes

Code	Effect
Down Right Up Left B B B B A A A A, at Pause Screen	Full Health
Hold Up and Left, then press A + B, on screen before any level	Infinite Time
Up Right Down Left A A A A B B B B, at Pause Screen	Scrolls Appear

Rally King Codes

Code	Effect
Select + Up + Left on title screen	Invincibility
Hold Select, then press Down and Right on title screen	Make Rival Cars Disappear
A B A B, then Up + Select on title screen	Start at Course 2
A B A B, then Left + Select on title screen	Start at Course 3
A B A B, then Down + Select on title screen	Start at Course 4

Star Prince Codes

Code	Effect
Hold Left, press Start on Game Over screen	Continue from level you died on
Hold Up and press AAA, then hold Down and press BBB, on title screen	Invincibility

Unlockables

Secret Ending for Haguruman 1 and 2

A secret ending will be seen if every stage is completed with less than 5 seconds left on the clock.

Secrets

Cosmic Gate Special Stages

A set of special stages can be accessed by playing on hard mode and activating the warp gate in stage 64. Activating the gate will take you from stage 64 to stage EE which continues through all of these stages: EF, F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, FA, FB, FC, FD, FE, FF, and finally 00,after which you will loop back to stage 1 again.

Skip to last level in Cosmic Gate

Fire 64 shots without hitting any enemies in the first stage and a warp gate will appear that will take you to the final stage.

Beat Guadia Quest without actually beating it

This secret will allow you to watch the credits of Guadia Quest without actually beating the game, but still earning you the medal for completeing the game. Go to the Mausoleum and walk nine steps up(you should be in the top left corner). Now press A and select Look from your menu. This will reveal hidden stairs. Speak with the man at the end of the stairs and answer all his questions with yes and you will get to view the credits.