Pokemon: Everything In The Johto Region Changed In HeartGold & SoulSilver

Johto changed a lot from Gen II to IV. These are the most notable found in the remake.

Pokémon HeartGold and SoulSilver Pokédex - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon HeartGold/SoulSilver (Game) - Giant Bomb

Johto - Bulbapedia, the community-driven Pokémon encyclopedia

Most common Hall of Famers in Pokemon HeartGold and SoulSilver : r/nuzlocke

Pokemon SoulSilver Version (#2) - (NDS) Nintendo DS

Either Remake Gold and Silver or Give Us a New Pokémon Game Set in Johto

Johto Route 40 - Bulbapedia, the community-driven Pokémon encyclopedia

Why We're Still Playing… Pokémon HeartGold and SoulSilver - Feature

PokeMMO HeartGold/SoulSilver (8/12/2023)

Nintendo Pokemon HeartGold w/ Bonus Figure and Walmart Exclusive Pokewalker Holder (DS)

Is Pokemon's Johto Bad?

Pokémon HeartGold/SoulSilver Set the Bar for Pokémon Remakes

Haven't been to Johto in a while? Then welcome back, fearless Pokémon Trainer! Pokémon turns back the clock to take you back to a land filled with

Pokemon HeartGold & SoulSilver: The Official Pokemon Johto Guide & Johto Pokedex: Official Strategy Guide (Prima Official Game Guide)

Why Pokémon HeartGold & SoulSilver Are The Best Games In The Series By Far, by Michael D'Angelo