Retro Game Challenge
Note: This game is also titled Game Center CX: Arino No Chousenjou.
Successfully complete all games to unlock the Final award: "Sound" option at the main menu; Credits mini-game (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); and records logged of Free Play mode games.
Cosmic Gate
At the title screen, press Down(2), B(2), A(2), Start.
Pause the game and press Up(2), A(2), B(2).
Haggle Man (Haguruman)
Pause the game and press Down, Right, Up, Left, B(4), A(4).
Pause the game and press Down, Right, Left, Up, B(4), A(4).
Pause the game and press Up, Right, Down, Left, A(4), B(4).
Pause the game and press Up, Right, Down, Left, A(4), B(4).
At the screen before a level starts, hold Up/Left and press A + B.
At the "Game Over" screen, hold Left and press Start.
Enter three doors in reverse alphabetical order.
Successfully complete all levels with less than five seconds on the timer.
Haggle Man 2 (Haguruman 2)
At the title screen, hold A and press Up(2), Right(3), Down(2), Left(3).
Pause the game and press Up, Down, Up, Down, B(2), A(2): Note: This can only be done once per game session.
Pause the game and press Down, Up, Down, Up, A(2), B(2). Note: This can only be done once per level.
At the "Stage Demo" screen, hold Up/Left and press A + B.
At the "Game Over" screen, hold Left and press Start.
Successfully complete all levels with less than five seconds on the timer.
Haggle Man 3 (Haguruman 3)
Pause the game and press A, B, A, B, Left, Right, Left, Right.
Pause the game and press B, A, B, A, Right, Left, Right, Left.
Pause the game and press B(2), A(2), Left(2), Right(2).
Rally King
At the title screen, hold Up/Left + Select.
At the title screen, hold Down/Right + Select.
At the title screen, press A, B, A, B, Up + Select.
At the title screen, press A, B, A, B, Left + Select.
At the title screen, press A, B, A, B, Down + Select.
Rally King SP
At the title screen, hold Up/Left + Select.
At the title screen, hold Down/Right + Select.
At the title screen, press A, B, A, B, Up + Select.
At the title screen, press A, B, A, B, Left + Select.
At the title screen, press A, B, A, B, Down + Select.
Star Prince
At the title screen, hold Up and press A(3), release Up, then hold Down and press B(3).
At the "Game Over" screen, hold Left and press Start.