How do you transfer deoxys from pokemon ranger to diamond?

To transfer Deoxys from Pokémon Ranger to Pokémon Diamond, first, complete the "Deoxys" mission in Pokémon Ranger and capture Deoxys. After capturing it, return to your Ranger headquarters and select the option to send Deoxys to your Pokémon Diamond game. You'll need a Nintendo DS or DS Lite to connect both games and follow the on-screen instructions to complete the transfer. Once done, you can find Deoxys in your Pokémon Diamond game.