no you need to free them form team rocket.
No. Mesprit, Uxie and Azelf can be caught normally, they're just extremely hard (especially Mesprit).
You can't, you will need to trade them from Pokemon Diamond, Pearl or Platinum.
I don't think so. I haven't tried it, but in platinum, no, I don't think you do.
to get a lv.1 mesprit you need to intter an cheat code.
You will need to catch the three lake lengendary pokemon. (Mesprit, Uxie, Azelf).
Its not Azelf its Mesprit that flees and you get it by using the Pokemon tracker app and you wil need a Pokemon with mean look so Mesprit does not flee.
You find them all at separate lakes. You can catch Uxie and Azelf at their lakes. Mesprit flees again when you go to her lake. You need to use the map marker poketch app to find it. PS: Don't fly towards the Mesprit. It will go to a different spot then. Use your bike or run to get to it.
there is nothing you really need to do with azelf, uxie, and mersprit. you just need to see them to complete your pokedex.
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.
After you've battled (and hopefully caught) Dialga or Palkia, Uxie, Azelf and Mesprit are available. If you go to Lake Valor (the lake in between Pastoria city and Veilstone City) and surf, you'll find a cave in the middle. Go in it. Azelf's there. It's as simple as that. Remember to save! I need the type of pokeballs needed too. And how many I need. Plz help I need to catch Azelf.
You need the marking map you used to catch mesprit You need the marking map you used to catch mesprit
Ok, acually, you need 7 badges and do Uxie, Azelf, then Mesprit, cuz Mesprit runs all over sinnoh, so get Mesprit or Cresellia, run in between routes until one of those two Pokemon are on your route not the one across from you, then battle the Pokemon and TRY TO CATCH IT AND IF YOUR ON YOUR LAST POKEMON AND ITS ABOUT TO KO, USE YOUR MASTERBALL (IF you didnt waste it on Palkia, Dialga Giratina, Uxie, or Azelf!!!) DONT WASTE THE MASTERBALL BEFORE U CHASE MESPROT OR CRESELLIA!