Azelf

Azelf is a legendary Pokémon known as the Being of Willpower and was first introduced in Chapter 17 of Stun. He was created along with his siblings, Mesprit and Uxie, by Dialga and Palkia to gift life with the willpower to grow and evolve.

Azelf seems to be more critical and cocky when compared to his siblings, remarking that Uxie is a nerd that is too weak to fight and that Mesprit is too wishy-washy and complains too much.

Azelf was one of the many legendary Pokémon to be captured by humans between the events of Stun II and Project Stun.