you can get any Pokemon that you want.
you can trade
The only way to get a Deoxys in Pokemon Heart Gold is to either trade it from another Pokemon game that has it, or use an action replay code.
No, there is not. Sorry...
There is none.
catching trainers Pokemon
Use a action replay
Through an action replay code
insert the action replay than take it out and put heart gold in.
go to necko seeker
Get an action replay from a game store.
I believe you can, but only with action replay.
dont cheat.