Slugterra - Season 1 Episode 31

The Shane Gang follow Diablos Nacho to Molemound - the Molenoid home cavern. Pronto doesn't want to go - and not because he's in trouble. It turns out Pronto is the rightful KING of the Molenoids. He's been ducking the crown for years since the king's main responsibility is settling arguments and fixing leaky plumbing. But Pronto must play king for a day while the Shane Gang follows Nacho into the great Molenoid library to stop him from taking a valuable map. Meanwhile, Pronto faces an unwelcome challenge for the throne by his Life! Long! Nemesis! Seedo.