It's a bat, a foam bat.

[He sighs. Pence would probably like the game a lot more if that was the case...but maybe not. It's not like he knew the real one.]

You're facing off against one other person, and you're sparring with the bats. The goal is to land hits and make the other person drop orbs, which you have to pick up. Whoever has the most orbs by the end of the time limit wins the match.