Pokéarth - Kanto - Route 3

Pokemon SoulSilver HeartGold Map by Brittlebear on DeviantArt

The Best Grinding Spots in Pokémon HeartGold & SoulSilver – FandomSpot

Pokéarth - Johto - Route 46

Pokéarth - Kanto - Route 7

Route 29, Johto Odyssey

Just Started A Hardcore Nuzlocke In HeartGold, And I Got The Best Possible Encounter In Route 42 : r/nuzlocke

Walkthrough:Pokémon HeartGold and SoulSilver (Part 4), Pokémon Wiki

Kanto Route 26 - Bulbapedia, the community-driven Pokémon encyclopedia

Route 26: Arrangement ◓ Pokémon HeartGold & SoulSilver

Route 30 - Pokemon HGSS Sheet music for Piano, Trombone, Tuba