level 24
Evolve from houndor. Houndor can be caught at night.
houndoom
it evolves at level 27
go to route 214 south and you will find a bid patch of grass and HOUNDOR sould be in there.
On pokewalker route volcano path or safari zone after you are able to add blocks. Actually you can find houndor on route 7 in kanto at night. Its an easier way to get houndor. I have soul silver and just a few days ago I caught a houndor on route 7. But it HAS to be at night
altering cave,
you can only get houndour in emerald
No one knows sorry.
You can't get houndour in sapphire only emerald and colosseum can.
All you need to do is train it to level 27
Houndour evolves into Houndoom starting at level 24.
you can find a houndor in the grass part b4 valor lakefront