This assumes Flareon Strats.

3 Pokeballs 6 Potions

Sell Nugget, TM34, and Pokeballs (if not down pokeballs/potions) Get 3 repels

SWAP DOUBLE KICK WITH BUBBLEBEAM AGAINST BOAT RIVAL EEVEE.

TEACH THUNDERBOLT IN SLOT 3

SWAP THRASH WITH BUBBLEBEAM AGAINST GAMBLER

10 X Accs, 5 X Speeds, 3-4 X Attacks, 4 X Specials

Fly Menu:
-swap slot 2 for repels
-teach fly
-teach horn drill over horn attack (SLOT 2)
-use repel
-swap slot 3 for X-acc
-teach rock slide over bubble beam (SLOT 1)
-fly to Lavender

Lavender Tower Normal
Heal in Celadon 

Silph
10th Floor Rocket: X-Acc Drill

-swap slot 4 for X-Speed
-teach EQ over Rock Slide (SLOT 1)
-swap slot 5 for Candies
-use Carbos

AFTER ARBOK:
-Candy to 36

Silph Rival: X-Acc, HDx3, EQ, HD 
Rocket: EQx2, Thrash
Giovanni: X-Attack: EQx4

Snorlax Menu:
-repel
-elixer 
-heal if necessary
-pokeflute 

Safari Normal 

Sabrina: X-Acc, X-Speed EQ x2, Drill

Koga’s Gym
-1st Juggler: EQ, Thrash
-2nd Juggler: EQ, EQ (TB)
Heal if necessary
-Koga: X-Acc, X-Speed HDx4

GET STRENGTH

Fly to Pallet Town

Pallet Menu:
-Swap Slot 6 with X-Special
-Teach Ice Beam over Thrash (SLOT 4)
-Repel
-Elixir
-Heal if Necessary
-Teach Strength to Lapras
-Teach Surf to Lapras
-Candy to 43
-Bike to Water

GET MANSION CARBOS 

Blaine: X-Attack EQx3

Erika: IBx3 

Fly to Viridian
-Heal if necessary
-Bike to gym 

Blackbelt: X-Atk EQx3

PICK UP REVIVE IF ONLY BOUGHT 3 X ATTACKS

Giovanni: X-Speed, EQ, X-Acc, Drillx4 
IF DIG TURN 1: X-Speed, X-Acc, Drillx5

When exiting the Gym:
-Repel
-Carbos
-Bike

Viridian Rival: X-Spec IBx2,TB, EQx3

GET MAX ETHER AND USE IN 1ST REPEL MENU AFTER WATER IF HIGH HP

E4 CENTER (IF NOT MAX ETHER)

Elite 4 
Lorlei: X-Acc, Drillx5 (you have an extra x-speed if bubblebeam speedfall)
SWAP BIKE WITH FULL RESTORES, ELIXER, Super Potion/Full Restore if necessary)
Bruno: IB, X-Acc, Drill x2, IB, Drill
Agatha: EQ, X-Speed TB (TB), EQx3 
Lance: X-Spec TBolt, IB, X-Spec, IB x4 (X-spec on 1st dragonair if hydro pump miss)
Champ: X-Spec IB, EQ, X-acc Drill, EQ, Drill, EQ