The NSC run is very short so it probably fits right in with what you want. As for consistency, there are some faster strategies that don't always work (they rely on getting certain stats), but there is a way that you can complete every run if you do the PP method. If you just want to complete a run, that's the way you want to do it.

Both of the routes are laid out here: http://wiki.pokemonspeedruns.com/index.php/Pok%C3%A9mon_Red/Blue/Glitched_No_Save_Corruption