weedle brock flies:
x acc x6: long pause, level 6
tm39 x21: no movement control
escape rope x37: no movement control
dire hit x37: no menu flash required, only costs half a second on route 3
max ether x37: poor movement control, couldn't get to a t-fly
x attack x41: needs a menu flash on route 3, mid size pause
awakening x43: poor movement control, but walks to mart, then disables menu, so only usable in Brock's gym
water stone x43: see above
calcium x43: long pause
current route jack item x65: long pause
tm07 x85: requires a pause, long pause
rare candy x88: requires fly away, still poor movement control
hyper potion x98: opens menu, disables buttons
hyper potion x107: requires menu flash, must be done on route 3/fly away
rare candy x110: no movement control
crja x111: long pause, requires menu flash

nothing using items already in the route is fast, dire hit is easily fastest

machamp brock flies:
tm37 x6: no movement control
ether x15: see above
masterball x21: get walked, so really slow, but doable
carbos x28: menu flash, very long pause
tm42 x30: menu flash, short pause
hyper potion x31: menu flash, mid sized pause
water stone x34: menu flash, short pause
super repel x38: must go to Brock's Gym, get tm34 text
antidote x45: 5 menu flashes and must use gym
water stone x57: requires a fly
x attack x63: menu flash, mid sized pause
max potion x83: poor movement control, must enter a house to fix
x attack x86: short pause

water stone is good since we already buy those, x attack works for both but is slow for weedle

can also get pokes like oddish (fire stone x99) and any other slow pokes/long evos

things that need to happen:
acquire 255 of an item (candies)
get master balls (pc underflow i think)
visit v road (must be after btw to e4)
visit seafoam
dupe moon stones (either after moon or mansion)
visit power plant (asap)
visit cerulean cave
do brock flies (possibly multiple rounds)
get super rod (before c cave, coast, maybe other stuff too)
some amount of cts and t-flies

by pokemon:
bulbasaur: starter
ivysaur+venusaur: evolve bulba, could also brock fly
charmander etc: coast, could brock fly
squirtle etc: coast, could brock fly
caterpie etc: forest
weedle etc: forest if seen, brock fly
pidgey: btw
pidgeotto etc: route 21
rattata etc: various places
spearow: route 16
fearow: route 23? also cycling road maybe
ekans: t-fly, could brock fly
arbok: evolve ekans, could also t-fly
pikachu etc: power plant
sandshrew etc: route 11/23
nido f: safari
nido m: safari/ct in forest
nidorino: game corner
clefairy: game corner
vulpix: mansion/route 7
jigglypuff: route 3/some backup
zubat: v road, could get in moon if have golbat
golbat: evolve zubat/cerulean cave
oddish: coast, could brock fly
paras: safari
venonat: safari/ct
venomoth: evolve venonat/c cave
diglett: 's cave
meowth: route 7
psyduck: seafoam
mankey: ct in vermillion
growlithe: ct on route 11
poliwag: fishing in pallet, could also do route 22 for goldeen
poliwhirl: fishing in celadon
abra: game corner
kadabra: c cave/evolve a second abra maybe?
alakazam: double distort, could brock fly
machop: v road
machamp: brock fly
bellsprout: route 7
tentacool: catch on a water route somewhere
geodude: v road
golem: t-fly from top trainer on route 15
ponyta: mansion
slowpoke: fishing, could ct in forest
magnemite: power plant
farfetch'd: trade spearow
doduo: safari, cycling road maybe?
dodrio: evolve doduo/c cave
seel: seafoam
grimer: mansion
shellder: seafoam? could fish i think, ct somewhere?
gastly: trainer fly first guy on route 11
gengar: t-fly on route 3 trainer
onix: v road
drowsee: route 11/ct in viridian
hypno: evolve/c cave
krabby: seafoam/fishing
voltorb: power plant
eggs: safari/ct in vermillion
cubone: t-fly of onix hiker, could ct on route 4 but requires an earlier ditto
marowak: c cave
hitmonlee: dojo
hitmonchan: ct on route 11
lickitung: ct in vermillion, could also trade slowbro, get a t-fly
koffing: mansion, can also ct
rhyhorn: safari/ct on route 16
rhydon: evolve/ c cave
chansey: c cave, t-fly backup i think
tangela: route 21, some backup?
kanga: evolve m
horsea: fishing, could do m ct
seadra: fishing/evolve
goldeen: fishing in c gym, could also do route 22 for poli, could brock fly/dd
staryu: seafoam
mime: trade abra, could t-fly from growlithe but need snorlax
scyther: t-fly from route 8, get at same time as super rod
jynx: trade poliwhirl, could ct
electabuzz: t-fly from dojo
magmar: mansion/t-fly from route 18
pinsir: game corner
tauros: t-fly on that water route
karp: buy it, could use a glitch
lapras: gift, could glitch
ditto: catch after m, could get earlier
eevee: gift
eeveelutions: get multiple eevees, could brock fly
porygon: game corner
onanyte: fossil, could glitch
kabuto: fossil/ct
aero: fossil
snorlax: t-fly from mime trade, could glitch
birds: duh
dratini: game corner
moo2: duh
moo: t-fly in cerulean

slightly modified shen route:
buy x balls, 1 para heal, 1 antidote in viridian
catch pidgey, get a potion
catch caterpie in forest if seen, or get during cts
btw to saffron, center
coin case in 5, candy in 6
get 214 coins (or 211 if win weird number)
buy abra, tp
dupe candy
set up pc underflow, withdraw jack, set up t-flies (decide how many/where), large number of coins
route 3, 6, 9, 12, 13, 16, 17, 20, 21, 24, pewter gym, vermilion gym, moon 1f, forest, rock tunnel b1f, mansion 1f are quantities
route 4 is masterball, as is 8, so probably choose 1
(also check how damaging withdrawing 36 full restores is here, hits power plant iirc)
electabuzz (route 6)
go to vermillion, get voucher, diglett, beat gym, tp
go to cerulean, t-fly mew (24), cubone? (9), get dig
do power plant here?, seems to work
go to celadon, shopping
sell some candies, buy 99 super repels, some stones, items for brock flies
can squeeze a t-fly here
catch spearow?
get fly, teach to mew
can maybe t-fly growlithe/dragonite/hitmonchan, unsure of route boundaries
could do golem t-fly here, since heading in fuschia direction anyway, defo do later if doing kabuto ct
would have to be vermilion gym though, all other t-fly slots taken
actually, route 21 unused and prolly faster
could move one to after reset though
do pewter stuff here:
trade abra for mime, then tfly snorlax (forest), then get old amber, do brock flies (gym and route 3 for now), btw to indigo
do v road now i guess, remember ekans t-fly (need something strong here though, maybe a brock fly poke)
get fossils here, so ekans on route 4
back to pewter, t-fly gengar in moon, get karp
at some point fly to lavender and jack down to super rod
fight scyther trainer for t-fly (12)
also at some point grab pokes from dojo and silph co
when out of t-flies, get eevees, set up more, grab surfboard
fish in celadon while here
can do cerulean cave from here (need surfboard)
fish for seadra and seaking
before ditto gives more knowledge on required backups
get a t-fly poke for route 21 if possible then go there
gastly is an option, magmar if not going for it in mansion, same for tangela
catch big bird, maybe tangela
repel for tentacool?
grab moonstone in mansion, don't worry about magmar or koffing too much
old man glitch and fossils, nickname ditto if needed
fish for horsea, also have shellder and goldeen
do seafoam
finish up with cooltrainers
growlithe, hitmonchan, dd alakazam, (venonat) (nido m)
cry because i forgot something important