Where to catch Raichu

In Paldea (Scarlet & Violet)

• Area Zero — Walk
• North Paldean Sea — Static Encounter
• Socarrat Trail — Walk
• West Province (Area Two) — Walk

In Kanto (Red, Blue & Yellow)

• Cerulean Cave — Walk
• Kanto Power Plant — Walk

Raichu — full Pokédex entry