I haven't found any reliable sources, but I believe Raikou, Entei, and Suicune all come back after the Elite Four if you didn't already catch them.
no
You would better hope u saved the game.because after u faint cobalion, the Pokemon will never come back. That was your last chance
Yes, Azelf will respawn, if you have fled or accidentally faint it, after defeating the Pokemon League.
No. If you haven't saved since then restart and try again, otherwise you missed your shot.
There is no real way to get Raikou to come to you. You have to keep trying to get to Raikou. It is lucky if you encounter Raikou.
The only way he will never come back is if you make him faint. Other than that he will always be running around Johto.
No
I haven't found any reliable sources, but I believe Raikou, Entei, and Suicune all come back after the Elite Four if you didn't already catch them.
no
If you faint Lugia he will probably not come back unless you turn it off without saving or you use cheat codes to get him.
Dont save it will never come back
That is okay, when he beats Pokemon League, all the Legendary Pokemon come back to their original places.
You would better hope u saved the game.because after u faint cobalion, the Pokemon will never come back. That was your last chance
You can get Entei and Raikou to come back by defeating the Elite 4 and Lance in Pokémon HeartGold and SoulSilver however this only works if you've defeated them previously. They'll keep on regenerating as long as you beat Lance however once you catch them then they won't regenerate anymore.
Yes you can catch it when you defeat it but you have to beat the elite four and Cynthia for it to come back.
Yes, Azelf will respawn, if you have fled or accidentally faint it, after defeating the Pokemon League.