Unown locations — where to catch

In Hisui (Legends: Arceus)

• Solaceon Ruins — Walk

In Sinnoh (Diamond, Pearl & Platinum)

• Solaceon Ruins — Walk

In Johto & Kanto (HeartGold & SoulSilver)

• Ruins of Alph — Walk

In Sevii Islands (FireRed & LeafGreen)

• Dilford Chamber — Walk
• Liptoo Chamber — Walk
• Monean Chamber — Walk
• Rixy Chamber — Walk
• Scufib Chamber — Walk
• Viapos Chamber — Walk
• Weepth Chamber — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Ruins of Alph — Walk

Other games (2)

• Brilliant Diamond / Shining Pearl (Gen 8): Solaceon Ruins
• Omega Ruby / Alpha Sapphire (Gen 6): Route 107, Mirage Spot Cave

Unown — full Pokédex entry