Game & Watch: Super Mario Bros. Cheats For Dedicated Console

1. Unlock The Mario Drawing Song

   Enter the time mode and hold down a for long enough and you will see a picture of Mario and the words "The Mario Drawing Song". Then press a and Enjoy!

   Contributed by: JudahTheSword09 

2. Factory test

   To access the menu, hard reset the console while it is plugged in: press the POWER button for 5 seconds, 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 (Randomized Control Trial)
   Sound (Volume 0 / 5)
   LCD (White / Black / Red / Green / Blue / Shade horizontal / Shade vertical)
   If the test results are OK, you must hold the B button to power off. Upon booting back, the system will have its time reset to 12:00PM.

   Contributed by: Subed-to_Bup 

3. Cheat Codes

   Enter at the listed location for the corresponding effect.

   Effect
   Play as Luigi in Ball	Press and hold A for 5 seconds at Ball's title screen
   Infinite lives in Super Mario Bros. and Super Mario Bros.: The Lost Levels	Press and hold A for 5 seconds at either game's title screen

   Contributed by: LuigiSan