Pokéarth - Kanto - Indigo Plateau

Pokémon HeartGold and SoulSilver - The Cutting Room Floor

Pokémon HeartGold and SoulSilver - Wikipedia

Pokémon HeartGold and SoulSilver — StrategyWiki

All Elite Four Battles!! [Pokemon HeartGold]

Appendix:HeartGold and SoulSilver walkthrough/Section 15 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon HeartGold and SoulSilver/Route 30 — StrategyWiki

Pokémon Communication HeartGold & SoulSilver Promos, Pokémon

Made It To Kanto in Pokemon Heartgold!

Heartgold : r/nuzlocke

Screenshot of Pokémon HeartGold Version (Nintendo DS, 2009) - MobyGames