After another glorious failure of a treasure quest, Jack embarks on another one to the island of the Three Witches. Jack is imprisoned by the witches and meets his cell mate Snuk. Jack escapes with Snuk to avoid marrying the lake monster resulting in yet another missed gain.
Jack uses Sternly Ed Nerdwood to find the Blue Karbunkle, but he ends up breaking it. The deity sends Jack and Snuk to get a key from the Isle of the Biclops to access the Singeing Sword on the Isle of the Locked Door to slay the dragon on the Isle of the Fearsome Dragon to get the gem.
Jack is ill from Fleebis. He goes on a quest to the isle of Zerzin to find the Beaten Boppen Boapen Berries, before D. Eath can claim him. Jack barely gets cured in time and inflicts death on D. Eath himself.
Jack reluctantly gives Sir Pansalot passage across the sea to the Isle of Happe to rescue his beloved Princess from the black knight Sir Percy. Jack is forced to fight Sir Percy for Sir Pansalot.
Angus catches Jack trying to steal his Golden Haggis. Jack challenges Angus to get it and simply fires him out of a cannon. Angus' ghost comes to reclaim the golden haggis. After much haunting, Jack finally gives it back.
After seeing a movie, Jack decides to teach the film director at Megamouth Studios what piracy really is. Boiling Point fires Steroflyn and hires Jack and Snuk. In every clip Jack gets an injury, often being eaten by a dinosaur. As a result Snuk becomes a Movie Star.
Snuk takes Jack to the last place he wants to go for his birthday: The Animal Funfair. Every ride and service proves to a shambles for Jack but exciting for Snuk. Jack makes the Scuffy Skunk robot insane. Snuk rides a plane, rescues Jack, destroys Scuffy and crash lands.
Snuk's blunders results in Jack and Snuk washed ashore on an island. Jack has a hard time surviving on the island, but Snuk takes it coolly and has better luck than Jack. At last they find a posh hotel resort, but it's a lot worse than what they've been through.
Jack and Snuk go on a quest for Count Draclia's castle for the golden wand. But Draclia has been expecting them. In attempt to steal the treasure box, Draclia zombifies Snuk and captures Jack. Jack manages to snap Snuk out of it and Snuk defeats Draclia.
Jack and Snuk get arrested by the police before they can begin their treasure quest. They are sentenced to the DMMV, in which Flash is their driving instructor. Jack fails the tormenting test and goes for the Ninny Class instead.
Jack goes to the D&D Wizards and Warriors Convention and steals a magic wand so he go on a quest to find the Enchantress Victoria im the Castle of 999 Delights. Once inside the castle, Jack finds Victoria is a devil lady who does 999 delightful tortures on Jack.
Jack and Snuk are crossing the frozen plains, when snow trolls attack and steal their ice-cream maker. After a visit to the Snow Sultan, Jack and Snuk go to find the trolls, only to be captured by them. Jack tricks them into lighting a barbecue and brings the ice-cream maker back to the palace.
Jack and Snuk dive in a submarine to find the pink pearl in the kingdom of Crustacia. Things go horribly wrong when they walk the seabed and they are taken prisoner by the Crustacians. They meet the imitation crab Chuck. They are taken to be eaten by a vicious clam. They all escape, but Jack doesn't manage to get the pink pearl.
Jack goes on a quest to rescue Princess Penelope from the dragon Darsh for a reward. Darsh is pretty dense for Jack since he listens to the Princess a lot and they both love each other. With that Jack cancels his quest and manages to save his skin from an unpaid debt.
Jack receives a threatening letter from Jean Clad, an old enemy of his. Jack and Snuk impersonate each other. Jean tells Snuk his story and abuses Jack. Before Snuk can get into a duel, Jack blows his cover. After Jack has a small talk, Jean departs.
Jack and Snuk head to the Island of Pink and Fuzzy in search of treasure. They reach the Fortress of Ultimate Cutness with a poodle Taloose. Finally they bypass the vicious Ted the Bear and get the treasure. However the treasure is cursed.
Jack inherits a fortune from his Uncle Mortimer with the requirement to deliver Scabby Doo to the Isle of the Hanna Barberians. Mortimer's ghost haunts Jack and Snuk on the ship trying to kill them. When they reach the island they find that Mortimer's butler Stewey was disguised as Mortimer's ghost to get the treasure for himself. To Jack's disappointment the treasure is dog biscuits.
While Jack and Snuk are starving at sea, an island tribe is having trouble feeding the Great Kapow. Before Jack can eat Snuk, they reach the island. The tribe treat Jack and Snuk to delicious food but are fattening them up for Kapow. When Snuk is thrown to Kapow, he finds Kapow is a man operating a machine to scare the tribe into feeding him. In the end Snuk puts everyone on a diet.
Jack plans to get rich by setting Snuk up, but gets in the nick too. Their cell mate Artouro tells them a treasure location. Jack and Snuk escape and head for Cheerful Valley. After crossing the desert and much digging, Jack and Snuk find the treasure, but Artouro reclaims it.
Jack finds treasure in a Mesoamerican pyramid when he is abducted by Flash and his buccaneer crew. Snuk recalls the days Flash got Jack into trouble in elementary school. Their old teacher appears in the sea and only Snuk answers her previous question correctly, but loses the treasure.
Jack has procured a magic lamp only to lose it to a sea monster. Angus Dagnabbit is the only one up to the job of catching the sea monster. After failing to catch the sea monster twice, all three get swallowed by the monster. They use the lamp and get sent into the lamp where they meet the Johnny.
Snuk loses money Jack gave him to a conman and is left with beans tied to string. Jack throws the beans in the sea resulting in a giant bean stalk growing. Jack and Snuk try to find treasure in a castle while avoiding the giant. After getting a giant coin, they all fall through the clouds giving the landlord his rent for the Sea Chicken.
Jack is on a hunt for the legendary Mummy's Toe. Jack gets hold of a decipher ring. In the pyramid Jack and Snuk find the treasure room meeting the imitation crab Chuck. Jack picks up the toe only to trigger collapses and the trio meet the mummy. After losing the mummy Jack is arrested for theft. (Season Finale)
