The best way to hatch an egg in diamond version is to use your bike, because as you know, the egg will get closer to hatching if you walk more, and riding your bike counts as walking.
There is no poke radar in emerald. Only in diamond and pearl and platinium
you have to trade spheres for it
You can't, you can only use poke transfer to transfer up generations not down.
after you complete the poke dex go talk to rowan
use poke balls on it
i don't know the code but there is another way you can if you have a fire red you catch a ditto and send him to the diamond version then you take any Pokemon rare candy or poke ball and they have an egg and you hatch it and its the Pokemon you put with ditto
i think u go to a poke convention but i think its past
You use poke transfer and transfer it from diamond platinum or pearl
Veilstone Werehouse. Run around and you'll find it in a Poke Ball.
Master ball
You can find a Houndoom in diamond, you find it in route 214 or 215 using the poke radar. well hope this helped.
its a blue shop where you can buy ethers and poke balls all sorts of stuff its blue and has a poke ball on top you cant find it on victoryer road or where your mom is.