I'm not exactly sure.......I accidently killed it in my Pearl version. It may either come back, or be gone forever.
Also, if you were to kill or harm Azelf in real life, Azelf's spirit would take away your willpower, making you completely immobile for all eternity (or until you died).
In platinum it would be better not to kill mesprit uxie and azelf, it would be better to catch them.
Then it's gone, sadly forever This happened to me because I didnt wanna kill it
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).
he is always there but, if you defeat azelf he will dissapear and never be in the cavern
NO it doesn't
you get a 25 boost on stats .
mewtwo,mew,zcrom,lugia,uxie,azelf
i don't think anything happens.....
Yes Mesprit likes Azelf. She has a crush on him I'm a fan of AzelfxMesprit
you either killed him or didnt catch/kill palkia or dialga
Azelf will disappear from the game once you flee from it in Pokémon Diamond. It cannot respawn in Pokémon Diamond since that feature for Legendary Pokémon was not implemented at that point in time.
I found it dificult but mespirit when he faints will just teliport to another place and for uxie and azelf you need to defeat the elite four and Cynthia then you can face them again.