Set Options before run
Name player and rival 1 char names
Manip a 1024 Squirtle

> Same idea as with Charmander, save at xx:15 from stairs
red_pal_gfskip_hop0_title0(S)_fsback(A+B)_fsback(S+B)_fsback(A+B)_cont(S+A)  (base cost: 294)
[53] DVs 1024    > IGT: 44-1

Tail whip x1, spam tackle rival
(Tail whip again before doing 1 damage)
Grab only antidote
(Can skip it and pick up hidden potion if poisoned, but lose more time)
TW x2 on Weedle fight, also need to swap moves
Center in Pewter
buy a rope and a pokeball
BTW to cerulean cave
Manip a ditto:

[228#24,17] - red_pal_gfskip_hop0_title0(S)_cont(A+A): U A U S_B U L S_B L U S_B U D S_B D A D, species 76 lv53 DVs E833 rng 7207-232 encrng 11465-4-255-3, cost: 315, owFrames: 315, default ybf: [ ], sel-df ybf: [*]  (56/60;  f36 = Hypno, f37 = no enc, f6+f7 = yoloball fail)

get CT, then rope/deathwarp out
enter that house
BTW again (No need to switch Squirtle to front)
walk to that tile, flash Pokemon/Items, NOT POKEDEX
walk to e4
In each battle, spam down on the move select screen until it glitches out, then backout
In the last 4 you need to wait a turn for Ditto to wake up first