Super Mario Bros. 3 is a very famous and popular game for the NES. There are normally two main ways to beat it: the quick way using warp whistles to skip worlds, and the longer way which goes through all the worlds.
Lord Tom goes the same route as the game end glitch run. However, he achieves total control of the game, pushing the run to a whole new level. He gives himself new powers, like the speed booster and the suit-swap, to name a few. Read the author's comments for more details.
This run was shown at Awesome Games Done Quick 2016 during the TAS block:
Note: The official encodes for this run include commentary from the author. The second YouTube stream also features input display.