Well, he's got Know Your Enemy which might come in handy, as well as Improvised Weapon, depending on if they need to fight. He's also got a Coin of Certainty (which always lands on heads) if they're going for a more tricksy route.

He doesn't have a lot of sailing skills outside of being a fast learner and Sora's desire to be a Pirate seeping through.

(Find Steed could also be available if they need more seahorses). That's all I have right now