When you catch dialga/palkia or defeat them, you can catch azelf and uxie in the lakes.Mespirit will flee so you gotta get a poketech radar to track it down.
you can go back and catch: -azelf -Uxie -Mesprit and also a SECOND -Palkia and a SECOND -Dialga
TO catch my Azelf, I just kept on throwing 5 ultra balls, then 5 timer balls, then 5 ultra, then 5 timer etc. etc. (this is what I do with all my legendary Pokemon actually)
If you knock out Azelf in Pokemon Diamond, Azelf will be gone forever (unless you have saved before battling Azelf and shut off the game and turn it back on to try again).
go to sunnyshore city if u haven't yet
you either killed him or didnt catch/kill palkia or dialga
azelf is at route 23
You can't catch Azelf in Pokemon Heart Gold. Sorry! But you can catch it in Diamond, Pearl or Platinum. Hope this helps!
After you catch dialga you go to Valor Lake and use surf across it. Then you go in the cavern and azelf in inside it.
the way you catch azelf mesprit and uxie.
=no=
you have to go to lake verity cavern and catch it.
Azelf is found in the Sinnoh Region, in one of the three caves in the middle of the three lakes. (Pokemon Diamond and Pearl). You can catch azelf after you catch the Pokemon Dialga or Palkia. It depends on the type of Pokemon game you have Pearl for Palkia and Diamond for Dialga.It would be best to catch Azelf with an Ultra ball. But if you havent used your master ball yet u can catch Azelf with that. Use Kricketune's false swipe, the use luxray's thunderwave to paralyze it. It took about 10 dusk balls.
In one of the three lakes.
nope
catch a azelf and rome around
no, if you ko a lgendary it will never come back if you beat azelf or uxie, they wont come back until you defeat the elite four. they will appear back in the caverns. anytime they fainted, defeat the elite four again if you want them back. im speaking from experimence here.