Um...Action Replay has errors, I have the same problems sometimes.
If you choose Deoxys and you're getting Sunflora, that means thats Sunflora's code and someone messed up...
I have some on mine, like Lugia, Mew,Mewtwo and alot of others, but No Deoxys....
But if you're interested in any other certain Pokemon you ask me, and if I have them I can give you their code.