Super Mario 128 is the fabled follow-up to Super Mario 64. Get it? 64 x 2 = 128
It was Nintendo's most-hyped game in the lead-up to the launch of the GameCube, but it never quite materialized... or did it?? If you look at elements from the game's groundbreaking demo, and follow the breadcrumb trail of Shigeru Miyamoto interviews, you might just draw the conclusion that you've played this game.
Here's the story of the most influential Mario game that doesn't quite exist: