* Pokémon Gold & Silver
* Pokémon Crystal
* Pokémon Black 2 & White 2
* Pokémon Omega Ruby & Alpha Sapphire
* Pokémon Sun & Moon
* Pokémon Ultra Sun & Ultra Moon
* Pokémon Let's Go Pikachu & Eevee
* Pokémon Sword & Shield
However, there are a couple of ways to get a Pokémon holding a Razor Claw in HeartGold:
* Trading: You can trade with someone who owns a game where Razor Claw is obtainable.
* GameShark/Action Replay: Using a cheat device allows you to obtain any item, including Razor Claw. However, this is considered cheating and may make your game less enjoyable.
If you're looking for an alternative item to help with evolution, you can use Metal Coat to evolve Onix into Steelix.
Remember, always play fair and respect the rules of the game.