The Mario game that can be beaten the fastest is Super Mario Bros. 3, which can be completed in 19 frames, or 0.316 seconds, by pressing buttons very quickly during startup to execute unintended code. Below is every frame from starting up the game to finishing it.

The (very complex) technical explanation on how this was achieved can be found here: tasvideos.org/7245S

@MarioBrothBlog I think that writeup has a bit too much jargon. For the explanation of the faster TAS I put in some effort making the explanation more approachable to a wider audience. It still has jargon, for sure, but I think it's better explained. tasvideos.org/7273S

@MarioBrothBlog Incredible.