Noctowl is a pokemon with good HP and Sp.Def, so he can take some hits. Its's got Reflect to boost its Defense, Roost to heal and Hypnosis to annoy. It's special attack is its best offensive stat, but only 76, so mediocre at best. Still, it means that ingame you should give it Air Slash for offense.

As you can see its offense is its biggest weakness, but Night Shade is a nice way to make up for that.

A very defensive bird.