Houndour locations — where to catch

In Lumiose City (Legends: Z-A)

• Lysandre Labs — Walk
• Wild Zone 6 — Walk

In Paldea (Scarlet & Violet)

• Poco Path — Walk
• South Province (Area Four) — Walk

In Kitakami (Scarlet & Violet – The Teal Mask)

• Fellhorn Gorge — Walk
• Infernal Pass — Walk
• Kitakami Wilds — Walk
• Oni Mountain — Walk
• Paradise Barrens — Walk
• Timeless Woods — Walk
• Wistful Fields — Walk

In Sinnoh (Diamond, Pearl & Platinum)

• Route 214 — Walk
• Valor Lakefront — Walk

In Johto & Kanto (HeartGold & SoulSilver)

• Johto Safari Zone — Walk
• Route 7 — Walk

In Hoenn (Ruby, Sapphire & Emerald)

• Safari Zone — Walk

In Sevii Islands (FireRed & LeafGreen)

• Altering Cave — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Route 7 — Walk

Other games (4)

• Ultra Sun / Ultra Moon (Gen 7): Poke Pelago
• X / Y (Gen 6): Kalos Route 10
• Black / White (Gen 5): Route 9
• XD (Gen 3): Cipher Lab

Houndour — full Pokédex entry