NSC TAS current route
Don't set options before New Game
Hold A or B during text to regain Fast text speed
Choose default name "Ash" for your player
Choose a custom name for the rival (times symbol, capital S, times symbol)
Fast options in game: after the intro, Start->Up->Up->Left+A->B->Start->Begin walking downstairs
Don't nickname Pikachu, but you do want to manip it to have 18 HP to find faster tackle crit setups
Rival 1: Growl Fail, Tackle Crit, Growl Fail, Tackle Crit
Get the Parcel with no encounters, then take full YOLOgrass back to Pallet
After getting the Pokedex, go back to the Mart and buy 2 Poke Balls (1 extra for bag space for the underflow menuing)
Manip an L3 Pidgey on route 1 (fastest considering the location of DSUM at this point)
Deposit Pikachu in Viridian and then use the Viridian center
Grab the visible forest potion
Sac L3 Pidgey to an L8 Pidgey gust crit which you encounter in front of the last bug catcher in the forest
After (1) deathwarping back to Viridian, set up a "THE manip" variant which involves:
(2) save and soft reset in Viridian City
(3) Dex flash on one of a few tiles in Viridian (sets up memory properly for glitch mart) (you can see which in current WR vid)
(4/5) Talk to town map (just need to do this sometime before step 6)
(4/5) Manipulate girl to top of screen (and as high up the map as she can possibly go), bird to 2nd most left tile of screen (relative to player)
(6) Stop movement, then restart movement by holding right 6 frames after the bird starts going left, to deload it mid-movement (puts 0xFE in C331, if you hit the right 2 frame window)
(7) Go down to deload girl before reloading the bird, exit house without reloading girl
(8) Jump ledge before going back in Forest

Finish out the glitch menuing
Forest Mart
    - Buy 1 TMTRAINER (glitched item, 2nd in buy menu), then exit mart
    - Buffer right to move a tile before exiting (immediately going down crashes; waiting wastes time to scripted movement)
    - Walk back to Viridian Mart
   
Viridian Mart
    - Upon entering, walk 1 left and "attempt" to save (press B at the Yes/No dialog)
    - Toss TMTRAINER x116 (you currently have 186, so mash down to get to 116)
    - Walk 2 up and flash your item bag
    - Open shop and attempt to sell TMTRAINER ("I can't put a price on that.")
    - Buy 1 more TMTRAINER (2nd in buy menu), then close the shop
    - Walk 2 down and "attempt" to save again
    - Toss TMTRAINER x1, then toss your top 2 items (Poke Ball, Potion)
    - "Attempt" to save again and walk 2 right
 
Underflow
    - Video: https://www.youtube.com/watch?v=ofcFqkG3BQg
    - Toss TMTRAINER x253 from the *first* slot
    - Swap slot 1 with slot 2 twice (causes the stacks to merge)
    - Before scrolling down, "attempt" to use TMTRAINER (not necessary, but avoids 1 click item)
    - Scroll down past a load of []x[] items until you hit some "real" items.
    - Swap TM41 x[]6 with TM41 x80 (rival name)
    - Swap TM41 x99 with item below Thunderbadge (map script ptr)
    - Swap Thunderbadge (map text ptr) with Helix Fossil (map id)
    - Close the menu