right. X Accuracy makes the OHKO moves always hit (as far as I know), and the X Speed is only needed if you need to outspeed someone. Also, I tried to do it again without using savestates, but I lost against Koga, who killed me with Sleep Powder/Psychic before I could set up. I had to go to the Mart beforehand rather than after to buy Full Heals to use until Sleep Powder missed (after I used the X items), lol. He was the only real problem I had, since I fought a couple extra trainers at the beginning to be at L26 for Misty to outspeed and survive a crit Bubblebeam if necessary. ended with a time of 2:52, but it could be better, I made some mistakes.
By the way, do you have a map of Kanto for Pokemon Yellow? I could probably use a R/B one, as I think only the gym leaders changed pokemon, right? I'm trying to map out which trainers to fight and stuff.