Black is a young man who aspires to be the Champion of the Unova Pokémon League. He has been dreaming of this since childhood, nine years to be exact. However, these dreams fill his head to the point where he cannot think about anything else and any attempts to causes him to pass out from mental exhaustion. With his Munna, Black can have him eat his dreams, which he refers to turning his mind from "blank white" to "solid black" or "Detective Time" (Japanese: 推理タイム). Doing this allows him to think much clearer, become smarter, and improve perception. Also, when he does this, he apparently sees in hexagons. Because of his dreams causing him to forget about other things, Black has the tendency to do things without considering the consequences of his actions and their effects on other people.