Pokéarth - Kanto - Route 14

Pokemon HeartGold and SoulSilver :: Full Walkthrough

Pokemon HeartGold and SoulSilver :: Legendary Pokemon Guide

Pokémon HeartGold and SoulSilver/Violet City — StrategyWiki

Johto Route 39 - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon HeartGold and SoulSilver/Route 32 — StrategyWiki

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

Route 30 - Pokemon Gold, Silver and Crystal Guide - IGN

ROUTE 26: Remastered ▻ Pokémon Heart Gold & Soul Silver

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

Johto Route 47: Remaster ▻ Pokémon Heart Gold & Soul Silver