How do you get houndoom Pokemon FireRed?

first catch two execute. go in daycare and go away and come back. there is man standing out side. he gives u an egg. walk in vermillion city and cerulean city. at cerulean talk man in poke center, and heal ur pokemon. go to altering cave and there egg hached. there comes exegutor. walk in cave a little time and then comes houndoom. catch it with pokeball or it change to zubaT