[Yellow NSC] Faster endgame

This is all gifvex's and luckytyphlosion's work (I don't know how to gen 1 glitch wtf). Everything here will also apply to the eventual non-255:59 manip route.

Video: https://youtu.be/ofcFqkG3BQg


> CHANGES FROM CURRENT NOTES

Rival Name:  ×S×     (× = multiplication symbol)
No need to flash S.S. Ticket (not needed when buying Escape Rope from Pewter Mart)
Walk Right 2 before Item Underflow
Underflow:
	- Before scrolling down, you can pretend to select TMTRAINER to avoid 1 click item
	- 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)

1 error.