In this fun hack, Mario's HUGE even without any power-ups.
This TAS aims for the fastest completion. It's almost 2-second faster than my original SMB TAS (04:57.31), because Mario can touch the flagpole and enter castles faster with the bigger hitbox.
The newest version 1.2 of this hack is used. In this version, Mario has a much bigger hitbox, making wall clipping harder, therefore 1-2 and 4-2 have different strategies.