Best Options:
* Ultra Ball: The Ultra Ball has a higher catch rate than the standard Poke Ball, making it a good choice for legendary Pokemon like Azelf.
* Premier Ball: If you caught Azelf in a previous game, a Premier Ball will have a higher catch rate than a standard Poke Ball.
* Dusk Ball: This ball works best when catching Pokemon at night or in caves, which might be relevant if you find Azelf in those environments.
Other Options:
* Great Ball: A slightly better option than the standard Poke Ball.
* Luxury Ball: This ball has a higher catch rate than the standard Poke Ball, but only works if you have befriended Azelf.
* Dive Ball: This ball has a higher catch rate when catching Pokemon underwater, but Azelf is not found in water environments.
Tips for Catching Azelf:
* Lower its HP: The lower Azelf's HP is, the easier it will be to catch.
* Use Status Conditions: If you can inflict a status condition like sleep or paralysis, it will make the catch rate higher.
* Use Berries: Berries like Razz Berries and Nanab Berries can increase the catch rate.
Remember that there's always a chance of failure when catching Pokemon, even with the best Poke Balls and strategies. Good luck!