Hypno locations — where to catch

In Paldea (Scarlet & Violet)

• Glaseado Mountain — Walk
• North Province (Area Three) — Walk
• South Province (Area Six) — Walk
• West Province (Area Three) — Walk

In Johto & Kanto (HeartGold & SoulSilver)

• Johto Safari Zone — Walk
• Route 11 — Walk

In Sevii Islands (FireRed & LeafGreen)

• Berry Forest — Static Encounter, Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Route 11 — Walk

In Kanto (Red, Blue & Yellow)

• Cerulean Cave — Walk

Other games (5)

• Ultra Sun / Ultra Moon (Gen 7): Hauoli City, Poni Plains
• Sun / Moon (Gen 7): Poni Plains
• Omega Ruby / Alpha Sapphire (Gen 6): Route 121
• Black 2 / White 2 (Gen 5): Dreamyard
• XD (Gen 3): Cipher Key Lair

Hypno — full Pokédex entry