Moveset:
Scratch
PS
Slash
EQ
Rock Throw
Strength
Swords Dance

Slash crit:
Sandshrew: 62,48%
Sandslash: 99.6%

Settings: SET

Buy:
4 Balls
3 Antis

Squirtle Strats

Post Brock Mart:
Buy 11 Potions

Caterpie: Tail Whip + 3x Tackle (4x Bubble)
Weedle: Tail Whip + 2-3x Tackle
Caterpie: Tail Whip + 2-3x Tackle (4x Bubble)
 
Rattata: Tail Whip + Tackle x3-4
Ekans: Tail Whip + Tackle x3-4
 
Weedle: Tail Whip + Tackle x2 (3x Bubble)
Kakuna: Bubble x3-4
Caterpie: Bubble x3-4
Metapod: Bubble x3-4
 
Caterpie: Bubble x4
Metapod: Water Gun x2
 
Catch Flier now!
Use Tackle!

Moon Manip:

Teach TM01 over Tackle

Rattata: Water Gun x2. If the first Water Gun leaves Rattata above 50% HP, use Mega Punch instead
Zubat: Mega Punch x2, (Water Gun)
 
Grimer: Mega Punch x2, (Water Gun)
Voltorb: Mega Punch, Water Gun
Koffing: Water Gun x3

Route 4: (Hold A in BIOS)
Sandan Manip: https://imgur.com/gallery/VEeIb6v (13,13,13,13) Normal Yoloball in Redbar/Non Redbar

Center

Swap Sandshrew with Squirtle
Settings to SHIFT!

Goldeen: Swap, Tail Whip x2, Mega Punch x2 if 29+ Attack. Otherwise Tail Whip, Mega Punch x3.
 
Staryu: Tail-Whip x1 (x2 if Misty uses an X-Defense), Mega Punch x2-3.
Starmie: Tail-Whip x2 (x3 if Misty uses an X-Defense), Mega Punch x3-4.

Mart:
Sell TM12
Buy 9 Pots

Center

Get Candy

Menu in House:
Teach TM34 to Sandshrew (Triple input)
Teach TM11 to Squirtle (3 under Candy)

Rival: Swap + BB x2, Swap + Scratch Spam, Swap + BB x2, Swap + MP x3

Nr.1: Scratch Spam

Nr.2: Swap + BB + Bubble, Swap + BB + Bubble

Nr.3: Swap + BB, Swap + BB + Bubble, Swap + BB + Bubble

Nr.4: Swap + BB + Bubble, Swap + BB x2

Nr.5: Swap + BB x2

Rocket: Swap + BB + Bubble, Scratch Spam

Menu:
Use 2 Candys on Sandshrew

Bottom Hiker: Swap + Bubble

Swap Settings to SET

Lass: Swap Scratch and Slash, Slash + Scratch, Slash + Scratch

Top Trainer: Slash x2 (Scratch)

Lass: Slash x3

Bill Menu:
Escape Rope (Triple Input)

Center

Dig Rocket: Slash x2, Slash x2

Get FR

Pidgeys: Slash Spam
Jr.Trainer: Slash Spam