The Guardian is a mid tier boat unlocked by defeating Don Swan, after which it becomes available for purchase from the Luxury Boat Dealer for $5,000. Unlike the more basic boats that can be bought immediately, obtaining the Guardian requires players to progress far enough to challenge and defeat a boss first.

Its unlock requirement makes it more of a progression reward than a starter vessel. Players who have already reached the point of fighting Don Swan can purchase the Guardian as a more advanced transportation option without needing to invest in some of the game's more expensive boats. This makes it a practical choice for players looking to upgrade their travel capabilities after progressing through the Second Sea.