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Game & Watch: Super Mario Bros.

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Title Screen

Game & Watch: Super Mario Bros.

Developer: Nintendo
Publisher: Nintendo
Released internationally: November 13, 2020

CodeIcon.png This console has unused code.
TextIcon.png This console has unused text.
DebugIcon.png This console has debugging material.

So very stubbly.
This page is rather stubbly and could use some expansion.
Are you a bad enough dude to rescue this article?

Game & Watch: Super Mario Bros. is a special Game & Watch unit made to celebrate the 35th Anniversary of Super Mario Bros., containing said game, The Lost Levels, and a Mario-themed version of Ball (a concept Nintendo had already done in G&W form as Mario the Juggler, itself notable for being the last game of the original G&W series).

Much to everyone's (dull) surprise, it was only available through March 31, 2021, though at least this one having a limited run is more understandable than the other two Mario games released around the same time considering its more niche demographic.

Another special Game & Watch unit, this one themed around the Legend of Zelda series, was released on November 12, 2021 for that series' 35th Anniversary.

To do:
Check for unused graphics. Clock graphics are stored before the Super Mario Bros. 2 ROM and can be viewed in a hex editor.

Factory Test Menu

To access the menu, power off the console by pressing the POWER button for 5 seconds, while it is plugged in, then hold Up + B, press POWER, then before the Mario Clock appears, release Up and B, and press GAME + PAUSE/SET.

After hitting this button combo, the system will cycle through the following tests:

  • Power (Eject / Insert / Current Battery Power + user confirmation)
  • Buttons (D-Pad / A / B / Face buttons)
  • RTC
  • Sound (Volume 0 / 5)
  • LCD (White / Black / Red / Green / Blue / Shade horizontal / Shade vertical)

If the test results are OK, hold B to power off. Upon booting back, the system will have its time reset to 12:00 PM.

The same menu is present in the Zelda Game & Watch and accessed the same way, the only change being the ability to test the additional buttons the console has.

Development-Related Text

A few miscellaneous strings are present in the internal flash.


printf_s: bad %s argument


constraint handler: bad message
(Source: Original TCRF research)