Is there a code for orb Pokemon Diamond?

There is no specific "code" for Orb Pokémon in Pokémon Diamond. The Orb is an item that unlocks certain evolutions in the game.

Here's how you can get it:

For the Red Orb:

* Obtain it from the Pokémon Mansion: After completing the "Mystery Mansion" post-game storyline, you can find the Red Orb in the Mansion's basement.

For the Blue Orb:

* Obtain it in the same way as the Red Orb: You need to complete the Mystery Mansion storyline. The Blue Orb is also located in the Mansion's basement, but you'll need to collect it after you've obtained the Red Orb.

Once you have the Orbs, you can use them to evolve certain Pokémon:

* Red Orb: Evolves the Pokémon *Grovyle* into *Sceptile*

* Blue Orb: Evolves the Pokémon *Blaziken* into *Mega Blaziken* (only in Pokémon Omega Ruby and Alpha Sapphire).

There are no cheat codes or special codes to get these Orbs. You need to follow the storyline and complete the Mystery Mansion challenge.