On Pokemon diamond where do you find unkown h?

You can't find Unown H in Pokémon Diamond.

Unown H is only obtainable in Pokémon Pearl.

Here's why:

* Unown Forms: In Diamond and Pearl, each Unown form is tied to a specific location within the game.

* H for "Hidden": Unown H is associated with the "Hidden" location, which is unique to Pearl.

So, if you're looking for Unown H, you'll need to play Pokémon Pearl.