Medicham locations — where to catch

In Lumiose City (Legends: Z-A)

• Wild Zone 16 — Walk
• Wild Zone 20 — Walk

In Paldea (Scarlet & Violet)

• Alfornada Cavern — Walk
• South Province (Area Six) — Walk

In Sinnoh (Diamond, Pearl & Platinum)

• Acuity Lakefront — Walk
• Mt. Coronet — Walk
• Route 217 — Walk
• Victory Road — Walk

In Johto & Kanto (HeartGold & SoulSilver)

• Johto Safari Zone — Walk

In Hoenn (Ruby, Sapphire & Emerald)

• Victory Road — Walk

Other games (4)

• Brilliant Diamond / Shining Pearl (Gen 8): Acuity Lakefront, Route 217, Victory Road
• Ultra Sun / Ultra Moon (Gen 7): Ultra Space Wilds
• Omega Ruby / Alpha Sapphire (Gen 6): Victory Road
• Black 2 / White 2 (Gen 5): Hidden Grotto, Pinwheel Forest

Medicham — full Pokédex entry