I'm sure his sheer awesomeness is making you head explode.

Arcetina is Giratina and Arceus's child and is the strongest Pokémon in the world.

He has 2000 as his stat total and can learn every single move. He also can kill Pokémon on sight, bring Pokémon back to life, and travel between dimensions as he pleases.

He also controls all of space and time and every Pokémon fears him.

He doesn't have a weakness and never will because he's immortal and perfect in every way. He literally can do anything and trying to stop him is stupid.