Where to catch Growlithe

In Paldea (Scarlet & Violet)

• East Province (Area Three) — Walk
• East Province (Area Two) — Walk, Static Encounter
• North Province (Area Two) — Walk
• South Province (Area Three) — Walk

In Kitakami (Scarlet & Violet – The Teal Mask)

• Apple Hills — Gift
• Crystal Pool — Gift
• Infernal Pass — Gift
• Kitakami Wilds — Gift
• Mossfell Confluence — Gift
• Oni Mountain — Gift
• Oni's Maw — Gift
• Paradise Barrens — Gift
• Reveler's Road — Gift
• Timeless Woods — Gift

In Johto & Kanto (Gold, Silver & Crystal)

• Route 35 — Walk
• Route 36 — Walk
• Route 37 — Walk
• Route 7 — Walk
• Route 8 — Walk

In Kanto (Red, Blue & Yellow)

• Pokémon Mansion — Walk
• Route 7 — Walk
• Route 8 — Walk

Growlithe — full Pokédex entry