What level does Bronzor evolve at in Pokemon Pearl?

The Pokemon Bronzor evolves due to level, and so affection doesn't have to be high, and he doesn't have to be holding anything. (Technically it is an "it," not a he, since Bronzor is genderless.)

Bronzor evolves into the Pokemon called Bronzong at level 33. It remains a Steel-Psychic type after it evolves.