Pokéarth - Kanto - Route 7

Pokemon SoulSilver HeartGold Map by Brittlebear on DeviantArt

Kanto Route 28 - Bulbapedia, the community-driven Pokémon encyclopedia

Route 29 Johto, Pokémon Heartgold & Soulsilver

Johto Route 37 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokéarth - Johto - Route 34

Johto Route 41 - Bulbapedia, the community-driven Pokémon encyclopedia

Walkthrough:Pokémon HeartGold and SoulSilver (Part 3), Pokémon Wiki

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

Here is a map I made with the location and info for all catchable Pokemon in Sun and Moon : r/pokemon

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