Here's why:
* Deoxys is not in the Pokemon Diamond game: Deoxys is a Pokemon that is exclusive to Pokemon Ruby, Sapphire, and Emerald. It does not appear in the Sinnoh region where Pokemon Diamond is set.
* Cheating is against the spirit of the game: Using cheats to obtain Pokemon outside of normal gameplay undermines the core principles of Pokemon. The joy of the game comes from exploration, training, and building a team the right way.
If you are interested in experiencing Deoxys in Pokemon, you could:
* Trade with someone who has a Deoxys: This is the most ethical and enjoyable way to get one.
* Play Pokemon Ruby, Sapphire, or Emerald: You can catch Deoxys in these games by following the special event instructions.
Important Note: Using cheats or hacked Pokemon can lead to issues like:
* Game corruption: Cheats can sometimes damage your save file.
* Online bans: Online services like Pokemon Bank and Pokemon Global Link may not accept cheated Pokemon.
Remember, enjoying the game fairly and earning your Pokemon is the best way to experience the full depth of Pokemon Diamond.