Pikachu locations — where to catch

In Lumiose City (Legends: Z-A)

• Vert Sector 8 — Walk
• Wild Zone 3 — Walk
• Wild Zone 6 — Walk, Static Encounter

In Paldea (Scarlet & Violet)

• Dalizapa Passage — Walk
• East Province (Area One) — Walk
• South Province (Area Four) — Walk
• South Province (Area Two) — Walk
• West Province (Area Three) — Walk

In Kitakami (Scarlet & Violet – The Teal Mask)

• Timeless Woods — Walk
• Wistful Fields — Walk

In Hisui (Legends: Arceus)

• Golden Lowlands — Walk
• Nature's Pantry — Walk
• Space-time distortions — Walk
• Windbreak Stand — Walk

In Sinnoh (Diamond, Pearl & Platinum)

• Trophy Garden — Walk

In Johto & Kanto (HeartGold & SoulSilver)

• Saffron City — Trade
• Viridian Forest — Walk

In Hoenn (Ruby, Sapphire & Emerald)

• Hoenn Pokémon Center — Gift
• Safari Zone — Walk

In Kanto (FireRed & LeafGreen)

• Kanto Pokémon Center — Gift
• Kanto Power Plant — Walk
• Viridian Forest — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Celadon City — Gift
• Route 2 — Walk

In Kanto (Red, Blue & Yellow)

• Kanto Power Plant — Walk
• Pallet Town — Gift
• Viridian Forest — Walk

Other games (8)

• Brilliant Diamond / Shining Pearl (Gen 8): Trophy Garden
• Sword / Shield — The Isle of Armor (Gen 8): Challenge Beach, Fields of Honor, Forest of Focus, Soothing Wetlands
• Sword / Shield (Gen 8): Galar Route 4, Giant's Cap, Giant's Mirror, Hammerlocke Hills, Lake of Outrage, Meetup Spot, Motostoke Riverbank, Rolling Fields, Stony Wilderness
• Let's Go, Pikachu! / Let's Go, Eevee! (Gen 7): Pallet Town, Viridian Forest
• Ultra Sun / Ultra Moon (Gen 7): Alola Route 1, Heahea City
• Sun / Moon (Gen 7): Alola Route 1, Hauoli City
• Omega Ruby / Alpha Sapphire (Gen 6): Fallarbor Town, Safari Zone, Lilycove City, Slateport City, Verdanturf Town
• X / Y (Gen 6): Friend Safari, Kalos Route 3, Santalune Forest

Pikachu — full Pokédex entry