Gladion, you're a liar.

You said your Type: Null was a "beast killer," but look at it's stats compared to the Ultra Beasts.
The only thing your "partner" Null is trying to kill is it's crippling depression.

And an insult to injury is that it's a Normal type when most of the Ultra Beasts are Fighting, Rock, or Steel types. Oh, and in case you didn't notice GLADION, is that Blacephalon is a part Ghost type as well.