Deep down, he wants to purify the Shadow Crystal so he can get it off of him, and go back to normal. But he is very threatening, and he is extremely powerful and dangerous. Not to the level of Arceus, Palkia, Dialga, or Giratina, though. Far weaker than them.

He is not as powerful as he claims he is sometimes; don’t let his words and boasting fool you. But, his powers are enhanced by the Shadow Crystal. He was accidentally corrupted by the Shadow Crystal when he got one stuck in his shoulder.