Where to find Pokémon in Johto & Kanto at Sea Route 20 (Pokémon HeartGold & SoulSilver)

Pokémon at Sea Route 20

• Tentacool — Good Rod, Old Rod, Surf
• Tentacruel — Super Rod, Surf
• Shellder — Good Rod, Super Rod
• Magikarp — Good Rod, Old Rod
• Chinchou — Good Rod, Super Rod
• Lanturn — Super Rod

Pokémon HeartGold & SoulSilver interactive map (Johto & Kanto)