Big credit goes to Dabomstew who routed this game previously! I adopted his old guide and turned it into a more update version. Also big thanks to dabom for find the High special Bellsprout manip :) 

good squirtle is 11 attack / 10 speed / 11 special at level 5, 
but realistically these will be a giant pain to reset for, so you can accept 1 lower in attack or speed (preferably not both)
or go for all 3 of 12 attack / 11 speed / 12 special at level 6, which is slightly lower stat requirements across the board but faster to check and should still be good enough

Rival: normal red rival

Mart: 2 Balls, 5 Potions, 2 Prz Heals, 3 Antidotes 

Enter Cave
Youngster: Tacklex3, Bubblex3-4, Bubblex3
First item ball is Escape Rope pick it up to sell later
Grind to Lvl 8 BEFORE PIKALASS, if an encounter is Zubat catch for Fly
L4 Diglett = 46, L4 Geodude = 49 (kill 4 of these total for around 200xp want to just hit level 14 before leaving the cave.)
SAVE BEFORE 
PikaLass: Tackle until Growled, Bubble | Bubblex4-5 unless still not Growled
Bug Catcher: Bubblex3-4 | Bubblex3 | Bubblex3
Get Candy and Repel (both items near the ladder)
Repel after 4 geodude/digletts killed. (sometimes end up no using the repel at all due to encounter RNG) 
take heal pad
Hiker: Bubblex3 | Bubblex3-4 | Bubblex3
Nerd: Bubble | Bubble
Learn WG over Withdraw
Weedles: WG+Bubble | WG+Bubble (If you don’t hit lvl 14 after this battle grind for more xp before leaving the cave).
TM34 Pick up on the way out of cave
GAMBLER OUTSIDE CAVE TO SOUTH – WG (bubble), WG (Bubble)

BELLSPROUT MANIP https://youtu.be/xVp53s8cd6Y (57/60 IGT) – USE CENTER AFTER LEAVING CAVE, MUST HAVE ZUBAT, FIRST 4 ITEMS ARE Pokeball, potions, Par heal, and Antidote in that order.
Yoloball is normal (down+A, open items, left/right+A)
IGTS – No encounter, failed yoloball, and 1 minimum spec stat

Set Options to shift inside the gym
GYM – Let squritle lead every fight, then swap to Bellsprout and spam VW
gym trainer: VW, VWX2
Karpman: VWX1 (if not 1 shot then its IGT bellsprout) VW X3-4 (use growth during Bides)

sell escape rope, buy buy 4 Repels (3 repels for next grasses, and 1 repel for Nug Bridge
Set options back to set
Heal Bellsprout with potion if needed before Maniac

Maniac: WGX2 | Swap to bellsprout VinewhipX2
Evole into Wartortle after this fight
JrTrainerF: WGX2-3 (bubble) | WGX2 (Bubble)
Hiker: Bubble, Bubble 

Take hidden Super Potion for safety (OC misses etc)
Take Great Ball 

Go to mart
Sell Great ball, TM34 Bide, TM12 Octazooka, and TM18 Counter
buy TM011 and TM08 and 3 Awakenings, can buy 2/3 pots if needing more healing items, 
-Teach Body Slam over Tackle, BB over Tail Whip, heal to full or close with pots 

SAVE BEFORE
Dig Rocket: BBX2 +(bubble)| BSx2 + WG (Crit KC and Confusion each do 13-16)
Teach Dig over WG and Heal before Bridge

Take Center after Dig rocket

SAVE BEFORE
Bridge Rival: Dig+BB | BB[r]+bite/bubble | BB | BS+Dig(lr)/BS(hr), 
Learn Bite over Bubble. 
Repel right before entering the grass
#1-Bugs: BB | BB
#2-Lass: BB | Dig
#3-Youngster: Bitex2 | Dig | BS+(bite)
#4-Lass: BB[r]+Bite | Dig
#5-JrTrainer: BS+BB Mankey can be faster, heal
Rocket: Dig | BS or BB + Bite

Hiker: BB | Bitex1-2 (bad range)
Youngster: Bitex1-2 (bad range) | BB
Hiker: BS (diglett can be faster and troll by digging several times)
Heal up before Tangela fucker
Tangela fucker: BSx3 (Bite to finish if possible)
Get HM01 then talk to JrTrainer from behind
JTr: Bite[r] | BS 
Lass: Dig | BS
Youngster: BS[r]+Bite | Dig[r]
Buy 6 Repels in the mart.
Swimmer: BB | BS+Bite
JrTrainer: Bitex2
Lily: Dig+Bite | BS until 2 attack/defense changes or out of PP, then Bite to finish

Take a Center after this fight, you have 2 to choose from
Use 2 repels on way back to mart
Sell Nugget, Buy 1 xacc, 3 xspeed, 2 xattacks, 7 x specs, 1 guard spec
After mart go east to the bottom tree
Swap repels up, teach Cut, teach Ice Beam over Bite, use a Repel
JRM: BB | BB
Bees: Dig | Dig
Starters: BB | BS[r]+BS | IB | BS

Enter Cave
Use another repel as you pass the crystal to your right.
Go down and fight the hiker with 1.
Hiker: BB
Use another repel around the big 2x2 crystal.
JrF: IB[r]+BS | BB(BB)
Becareful not to hit the optional lass before nerd 
Nerd: BB | BB
Use another repel after the fight, exit the cave

Mart buy 5 Super Potions and 2/3 more Para Heals.
Get HM02 Fly on your way through the city.

Gym 
Lass1: Xspec IB (BB)| IB
Beauty: Dig[r] | Dig[r] | IB[r]+BS | BS
CTF: BS | IB | IB[r]+BS

SAVE BEFORE
Lois: Xspc, IB, IB, IB (pray for no Stun Spore hit basically; you have extra XSpecs)(if any IB got wasted before this fight you will be short 1)
Waterfall goes over Bubblebeam. 

Take Pokecenter next to Lois gym

DONT REPEL KILL 1 ENCOUNTER ON WAY EAST OVER TO MART

Mart: Sell - TM21.
Buy - Buy 12 Super Repels, 1 Beer Keg (optional more PAR heals or Super Pots)

GYM
First trainer in Gym can be bypassed at max range.
2nd trainer - Dig | Dig
candy to 33 before gentleman and cure paralysis if needed.
Gentleman - Dig (DR if growled)
Cure Paralysis, heal if hit by an electric move up till now, fight Sparky.
SAVE BEFORE
Sparky - Dig, Switch or XAtt if growled, Xspeedx1-2 (2 unless 14+DV), Digx2
(14DV speed + low attack might cause a DR)
GET INSTANT TEXT AFTER GYM, Building north of gym
Go east and fight Bug Catcher.
BC - BS | BS | BS (DRs on paras with not 11 attack)
Youngster - BS | Wfall
Skillfully dodge the lass, then yolo 5 tiles of grass.

Get the flypoint for the Tower city then come immediately back and enter Rocket Warehouse.
No repel necessary in here.
Rocket 1 - BS | BS | IB+WF | IB | BS unless growled thrice
Rocket 2 - WF (37/39, has Sonicboom, faster) | BS | BS (faster, 18-22)
Heal decently before rocket on next floor.
Rocket 3 - WFx1-2 (bad range) | WF+IB (Evolve into Blastoise after fight)
Skillfully dodge the rocket in the civilian room.
Rocket 4 - IB | Dig | WFx2 (range)
Giovanni - IB (range) | IB | IB | IB/WFx2
Dig out. 

Swap Repels up, teach Fly to Zubat, Fly to Botan City (1down)
Head south, cut bush, 
SKIP FIRST 2 TRAINERS THEY ONLY FIGHT IF TALKED TOO (Lass and JrM)
Lass: Birds+Chou: IB | IB | BS
JrM: Nido+Trio: WF | WF
Take the center in this place.

Enter the "Lighthouse" and use a Super Repel.
Hit the first switch, ignore the right path and go up.
3F: Head up, hit switch for Elixir and turn it back off 
"teleport" to ground floor. Far left telepad
Scientist: Dig | IB+WF
Use another Super Repel after the Scientist, head for the stairs.
Turn on switch in the sign, go up for another Scientist fight.
Scientist: BS | IBx1-2 (30%)
Get candy next to another switch and hit the switch.
Get Virus Scan and dig out, fly to Botan again (1d)

Enter Not!PokemonTower
Mura: WF[r] | BS | Dig | IB | IB[r]
Use another repel as you enter 3F.
North to fight:
Ch1: Channeler guarding the Card Key - Dig
Take it, then go back south
CH2: Ekans - BS
Ch3: Dig
Take TelePad
Ch4: Dig | Dig (DR)finish with WF?
Ch5: Dig
Ch6: IB
Take TelePad
Ch7: Dig
Take heal pad.
Ch8: Dig
Take Telepad
Ch9: Digx3 (Misdrea DR)
Kanga: WF[r]+BS
Don’t Learn Skull Bash, Use Rare Candy, then take telepad
Rock1: BS | IB | IB
Rock2: WF | BS+BS/IB (depending on ranges)
Rock3: IB | IB | BSx2 | WF
Get Flute from NotFuji, 

West to Rocket Warehouse again.
Go to 3F where the civilians are, open CK door, take bottom ball for Red Amulet, Dig.

Enter Koji's Gym.
Koji: XSPCx2, IB | WFx2 | IB | WF

Enter forest, Super Repel, fight trainers.
BC1: IB | IB
YOYOYOYO: BS(WF Bfree if bad Atk) | Xspec+BS | WF 
Rats: WFx3
Use another Super Repel after Rats guy.
Wake and run from Snorlax.
Get the hidden Rare Candy in the left of the two trees here 
Fight the fisher guarding the Surf house.
Wartortle: BSx2
Get HM03, teach to Blastxoise over Waterfall, fly to Hayward City (up3)
Go straight to 5F, buy 5 xaccs, 5 xspeeds, 10 xattacks, 20 xspecs
Fly to Seashore City (1up), take Mom Heal then go to the gym.
SAVE BEFORE
Haunter: Xattack+Dig
Do the convoluted movement to avoid all other trainers, then fight Sheral
XATKx4, Xspeed, Slamx2-3, Slamx2, Slamx2, Slam
Fly back to Castro Valley (Down 4)
Go to Castro's mart, sell one gym leader TM, buy 10 Hyper Pots Return to Castro Forest, ignore the stairs and go south
Skip the Ether, but Super Repel again as you pass it
BC: Beedrill - Surf
Enter the Normal Gym
Quiz: Yes, <no machine so fight>, No, No, Yes, No
Gym Trainer: XSpec Surf Surf[R] Surf IBx2
Heal up to full before Joe. SAVE BEFORE
Joe: XSpecx2, Surf, Surf (outsped), [Heal]+IB, Surfx2 (not a bad idea to xspeed for safety)

DIG out of the gym, Fly to Moraga (down3).
GO west until you reach Eagulou.
Repel again at the start of the Eagulou cave.
Ignore the switches etc, 
Get HM04 and then teach it over Body Slam
Push the boulder in that house to get the Mist Stone (aka secret key)
Fly back to Eagulou (2 Down)

Enter the Gym Cave and use a Super Repel.
Begin the massive boulderpush o'doom.
get candy (2nd item ball you see during the massive boulderpush o'doom)
CTF: xspc, surf+strx2 | surf[r]
CTM: xatkx2+(Xacc), IB[bad DR] | Surf | Strx2 | Str
Hold B during the spinners to make them go marginally faster.
CTM2: Xattack, Xacc, StrX2-3 | Strx3
NQ: surf[r]
RARE CANDY to level 54 < USE ELIXER < HEAL IF NEEDED
Machamp: Surf+ib[r]
NK: surf
Fightings: xspc+surf+surf+str (2surf dr) | surf | surf
Scytherchu: ib | dig (speed ranges)
Palletpatrol: xspc surf surf ib ib+ib ib[r]
Gio: xspc xspd ib ib surf ib surf[r]
Dig out 
fly to league in jaeru city (2 up)
buy 3 elixirs ($15000) + (Should still have hyperpots to heal with), Buy a few Full Heals or Full Restores
teach fissure over dig and elixir
Deposit 2 extra pokemon into pc?

e4
red: xspc surfx5
tales/nine need 3+ speed
dash needs 11 but has agility anyway
typh needs 7
no overly threatening moves

poison ass: xspec, xacc, xspeed, fissure, ib, fissurex3
(if Arbok gives 2 badge boosts on spec+acc turns, skip xspeed.
if it gives 1, skip xspeed if 10+ DV speed)
(NOTE: If Arbok Glares on the first 2 turns, 
and then Poison Guy X Defends as you X Speed, the speed drop is reapplied.
Must X Speed again in this case.)
FR, elixir
agatha: xspec, xspeed, xacc, fissure, ib (IB), fissurex3
(changed order to allow for T2 crobat switch. T1 crobat switch = RIP probably)

Hold B during auto movement to speed it up, FR
lance: guard spec, xspecx3 [xspd if 0DV], ibx2, ib, ibx2, ib, surf
FR, elixir

mura: xacc, xspeed, IBx1-2[dr], fissurex5
(if locked into rage, xspc maybe)