In platinum it would be better not to kill mesprit uxie and azelf, it would be better to catch them.
kill it or catch it
nothing happens.
if you want to capture them no. if you do yes
I'm not sure. I don't think that getting the lake Pokemon is necessary to completing the game. Correct me if I'm wrong
Absolutely Nothing My Friend
nothing
If you kill azlef, It will FNT. so... save while you are in the cave.
Kill or capture the red Gyarados at the Lake of Rage.
Nothing, you just can't catch him.
it wil never come back...
a lake in Pokemon
Once you kill Tornadus, you have two chances. Since it is a legendary Pokemon, there is only one of its kind, and will appear after the first one.