However, there are ways to obtain Ditto via these methods:
* Trading: The most common way to get Ditto is through trading with other players. Find someone who has a Ditto and trade for it.
* Event Distributions: In the past, Ditto has been distributed through special events in other Pokemon games. It's unlikely that this will happen for HeartGold, but keep an eye out for any announcements.
* Cheats: There are ways to cheat in HeartGold and force a Ditto into your game using cheat devices or save file manipulation. However, this is not recommended as it can cause problems with your game and potentially corrupt your save file.
Please note: It's important to be aware that obtaining Pokemon through illegitimate means is against the spirit of the game and can be considered cheating.