Where to catch Houndoom

In Paldea (Scarlet & Violet)

• North Province (Area Two) — Walk
• South Province (Area Four) — Walk
• South Province (Area Six) — Walk, Static Encounter

In Kitakami (Scarlet & Violet – The Teal Mask)

• Chilling Waterhead — Walk
• Crystal Pool — Walk
• Fellhorn Gorge — Walk
• Infernal Pass — Walk
• Kitakami Wilds — Walk
• Oni Mountain — Walk
• Paradise Barrens — Walk

Houndoom — full Pokédex entry