Hoenn isn't reachable in Pokémon Diamond with or without an action replay code, nor is any other area from previous generations. Pokémon Gold and Silver are the only games were the player can explore more than one region. However a remake of Pokémon Ruby and Sapphire (titled Omega Ruby and Alpha Sapphire) for the 3DS is set for release near the end of 2014.
if you want a rayquaza go to your PC (in Pokemon) before that use the R4 or action replay put hoenn legends
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sometimes there will be swarms after you get the national dex.
you can't sorry
You can't. The only ways you can get a DEOXYS in Diamond are you hack, use an action replay or game shark, or you migrate one from Hoenn and catch it in pal park. Good day to you.
Uh...there isn't one...
there is not one but after you get the eevee in firered/leafgreen and connect pc's in kanto to hoenn you can trade that eevee over to hoenn.
If you mean go to hoenn you can't
You cant get to hoenn on pokemon diamond. Sorry.
stop scaming my time you just eat a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................banana
action replay code
It Is Area Unknown So Someone From The Hoenn Region Has To Give One To You Or Get A Action Replay Then Put In A Cheat Code On How To Get Rayquasa