Johto Route 36 - Bulbapedia, the community-driven Pokémon encyclopedia

Johto Route 43 - Bulbapedia, the community-driven Pokémon encyclopedia

Johto Route 38 - Bulbapedia, the community-driven Pokémon encyclopedia

Johto Route 30: Arrangement ◓ Pokémon HeartGold & SoulSilver

Johto Route 47 (From Pokémon Heart Gold & Soul Silver) - Single - Album by The Zame - Apple Music

Route 34 (From Pokémon Heartgold & Soulsilver) [Arrangement] - Single - Album by Pokestir - Apple Music

Pokemon HeartGold & SoulSilver - All Pseudo-Legendary Pokemon Locations

Pokéarth - Johto - Route 46

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

Pokémon HeartGold and SoulSilver/Johto — StrategyWiki

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