Meowth locations — where to catch

In Paldea (Scarlet & Violet)

• Casseroya Lake — Walk
• Dalizapa Passage — Walk
• East Province (Area Three) — Walk
• East Province (Area Two) — Walk
• South Province (Area Two) — Static Encounter
• Tagtree Thicket — Walk
• West Province (Area Three) — Walk
• West Province (Area Two) — Walk

In Sinnoh (Diamond, Pearl & Platinum)

• Trophy Garden — Walk

In Johto & Kanto (HeartGold & SoulSilver)

• Route 38 — Walk
• Route 39 — Walk
• Route 5 — Walk
• Route 6 — Walk
• Route 7 — Walk
• Route 8 — Walk

In Hoenn (Ruby, Sapphire & Emerald)

• Hoenn Battle Frontier — NPC Trade

In Kanto (FireRed & LeafGreen)

• Route 5 — Walk
• Route 6 — Walk
• Route 7 — Walk
• Route 8 — Walk

In Sevii Islands (FireRed & LeafGreen)

• Bond Bridge — Walk
• Canyon Entrance — Walk
• Cape Brink — Walk
• Five Isle Meadow — Walk
• Kindle Road — Walk
• Ruin Valley — Walk
• Sevault Canyon — Walk
• Treasure Beach — Walk
• Water Path — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Route 11 — Walk
• Route 38 — Walk
• Route 39 — Walk
• Route 5 — Walk
• Route 6 — Walk
• Route 7 — Walk
• Route 8 — Walk

In Kanto (Red, Blue & Yellow)

• Route 5 — Walk
• Route 6 — Walk
• Route 7 — Walk
• Route 8 — Walk

Other games (8)

• Brilliant Diamond / Shining Pearl (Gen 8): Trophy Garden
• Sword / Shield — The Isle of Armor (Gen 8): Brawlers' Cave, Courageous Cavern, Frigid Sea, Giant's Bed, Path to the Peak, Snowslide Slope, Stepping-Stone Sea
• Sword / Shield (Gen 8): Dusty Bowl, Route 4, Giant's Seat, Isle Of Armor Caves, Stony Wilderness, Turffield
• Let's Go, Pikachu! / Let's Go, Eevee! (Gen 7): Cinnabar Island, Kanto Route 24, Kanto Route 25
• Ultra Sun / Ultra Moon (Gen 7): Route 2, Hau'oli City, Malie Garden
• Sun / Moon (Gen 7): Route 2, Hau'oli City, Malie Garden
• Black 2 / White 2 (Gen 5): Nimbasa City
• XD (Gen 3): Phenac City

Meowth — full Pokédex entry