In DPPt:
Uxie is at Lake Acuity at Level 50
Mesprit roams Sinnoh ar Level 50
Azelf is at Lake Valor at Level 50
In B2W2:
Uxie is at Nacrene City at Level 65
Mesprit is at Celestial Tower at Level 65
Azelf is at Route 23 at Level 65
=no=
sorry man, but you cant get a azelf uxie or mesprit in Pokemon soul silver...
the way you catch azelf mesprit and uxie.
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.
no you cannot
Search it at GTS
Catch them?
after you relese uxie,azelf and mesprite
yes if you dont catch them
they are the three legendary trio of lakes they live in three lakes azelf in lake valor mesprit in lake verity and uxie in lake acuity
no, you don't have to but I did just for completing the dex
Yes. Then, after the Dialga/Palkia event, you can go to the lakes and catch them all at level 50.