Retro Game Challenge Cheats - Nintendo DS

Cheat Codes
Cosmic Gate
Enter the following codes at the indicated screen:

(At Title Screen) [Down], [Down], [B], [B], [A], [A], [Start] - Hard Mode.
(At Pause Screen) [Up], [Up], [A], [A], [B], [B] - Ship Power-Up.
(At Pause Screen) [Up], [Up], [A], [B] - Become the powered up form of Infinity (can be used one per game).
(At Game Over screen) [Left] + [Start] - Continue the game with 000 Score.

Haggle Man
Enter the following codes at the indicated screen:

(At Pause Screen) [Down], [Right], [Up], [Left], [B], [B], [B], [B], [A], [A], [A], [A] - Full Health.
(At Pause Screen) [Up], [Right], [Down], [Left], [A], [A], [A], [A], [B], [B], [B], [B] - Scrolls Appear.
(Before any level) Hold [Up] + [Left], then press [A] + [B] - Infinite Time.

Haggle Man 2
Enter the following codes at the indicated screen:

(At Pause Screen) [Up], [Down], [Up], [Down], [B], [B], [A], [A] - Full Power.
(At Pause Screen) [Down], [Up], [Down], [Up], [A], [A], [B], [B] - Scrolls Appear.
(At Game Over screen) Hold [Left], press [Start] - Continue from level you died on.
(At Title Screen) Hold [A], then press [Up], [Up], [Right], [Right], [Right], [Down], [Down], [Left], [Left], [Left] - Stage Select.

Haggle Man 3
Enter the following codes at the indicated screen:

(At Pause Screen) [A], [B], [A], [B], [Left], [Right], [Left], [Right] - 99 Lives.
(At Pause Screen) [B], [A], [B], [A], [Right], [Left], [Right], [Left] - 9999 Gears.
(At Pause Screen) [B], [B], [A], [A], [Left], [Left], [Right], [Right] - Warp to boss.

Rally King
Enter the following codes at the indicated screen:

[Select] + [Left] - Invincibility
(At Title Screen) Hold [Select], then press [Down], [Right] - Make Rival Cars Disappear.
(At Title Screen) [A], [B], [A], [B], then [Up] + [Select] - Start at Course 2.
(At Title Screen) [A], [B], [A], [B], then [Left] + [Select] - Start at Course 3.
(At Title Screen) [A], [B], [A], [B], then [Down] + [Select] - Start at Course 4.

Star Prince
Enter the following codes at the indicated screen:

(At Game Over screen) [Left] + [Start] - Continue from level you died on.
(At Title Screen) Hold [Up] and press [A], [A], [A], then hold [Down] and press [B], [B], [B] - Invincibility.

Alternate Ending for Haguruman 1 and 2
An alternate ending can be seen if every stage of is finished within 5 seconds or less remaining on the clock. This also applies to Haguruman 2.

Completion Bonuses
Successfully complete all games to unlock the following bonuses:

Final award.
"Sound" option at the main menu.
Credits mini-game. Note: Press [A] and [B] to shoot Arino's head. Remain idle at the "End" screen to hear Arino say various things up to thirty minutes later.
Records logged of Free Play mode games.

Warp to final level in Cosmic Gate
In the first stage, fire 64 shots without hitting any enemies. A warp gate will appear that will take you to the final stage.

Guadia Quest: "Beat" the game without beating the game
This trick will let you see the credits of Guadia Quest without having to go through the entire game, thus earning you the medal that recognizes your completion of the game (for Arino's final challenge). First go to the Mausoleum (the path to get to the Mausoleum is located east of Centraan between some mountains and the ocean; you will need to enter the path from north of the mountains). After you go into the Mausoleum, walk nine steps up (you will be in the top left corner). Then press [A] to open the menu and select "Look."

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 which upon completion will loop you back to stage 1 again.