Where to find Growlithe in HeartGold & SoulSilver

• Route 36 — Walk
• Route 37 — Walk
• Route 48 — Walk
• Route 7 — Walk
• Route 8 — Walk

Growlithe in every game · Johto & Kanto interactive map

By game: Pokémon HeartGold map · Pokémon SoulSilver map