Good: have tail whip, so faster rival fight on average
Are water type, so 2 shot by lv 5 pikachu

Bad: Massive amount of RNG around the pidgey/slowbro catches, as neither can be manipped (we're talking single digit success %)

Faster in the ideal case, slower on average in a no-reset run, as if slowbro has bad special, you have to reset all the way to before the deathfly.

Same ID
Skip PC potion
Choose squirtle
Tail whip rival fight
Center in viridian during parcel trip
Skip mart guy potion
Skip town map
Buy 9 pokeballs
Skip tree potion
manip lv 5 pikachu deathfly (https://youtu.be/_9LwKhwp7pk)
[Consider picking up tree potion if want to be as safe as possible, to heal pidgey damage]
After deathfly, catch a level 3-4 pidgey (cannot manip) (If level 3 pidgey, name AA)
Menu flash
Catch the Nidoking/Slowbro, hope for 16 special (5/16 for nidoking, 6/16 for slowbro)
If low on balls, pick up weedle guy potion and sell it to buy an extra
If really low on balls, also pick up the antidote and the corner potion
If really really low on balls, reset (or pick up forest ball)
Switch Nidoking/Slowbro to front before btw
Buy an escape rope
Switch pidgey to front if have nidoking
Catch ditto (AA pidgey works, SLOWBRO also seems to work)
Rope out
Catch 2 f4
magic swap shenanagans
5 <> 1
1 <> 12
19 <> 17
7 <> 1
7 <> 17
Win