Super Mario Bros. Deluxe is a remake of the original Super Mario Bros. with some new game modes, including a challenge mode where coins and time remaining are crucial to gaining the target score and a race mode where Mario competes against Boo to reach each level's finish flag pole first. While this mode looks like a direct port of the NES game, there are different physics and glitches, making optimizing Deluxe a very different task.
While it may look three seconds slower, this run is actually 12 frames (0.2 seconds) faster than the previous version, with the improvements coming from the usage of a Fire Flower to complete World 8-4 faster and better optimizations. The time differences are due to the addition of the Game Boy Color boot screen and emulation differences.
There is also a run of the "You vs. Boo" mode.
Watch a resync of this run being played back on a real console.