The Accidental Volcano (The Alien Adventures of Finn Caspian, Bk. 2)

Finn Caspian and his friends are excited to explore a brand-new planet . . . until Finn's mom makes them bring along an annoying new robot named Voltronix Zu. Putting up with Voltronix's bragging is bad enough, but can the four friends find a way to save the planet - and the adorable aliens who live there - once Voltronix turns the whole planet inside out?