Sid the Pirate and his first mate, Arrby, take the sunken sloop; a wiggling whale knocks the diving bell to the bottom of the ocean, with Cap'n Turbot and Francois trapped inside.
Francois and Turbot learn an underwater volcano is going to erupt while Farmer Yumi and Mayor Goodway are scuba diving nearby; Farmer Al's farm is flooded.
Axle City is enjoying the balloon fair until Crusher and Pickle get stuck on a runaway hot air balloon; now, it's up to Blaze and AJ to rescue their high-flying friends before they crash into the Slime Volcano.
When Crusher and Pickle are trapped inside a cage over a bubbling slime swap, it's up to Blaze, AJ and Sparkle to become Knights; they must rescue Crusher and Pickle from the swamp before it's too late.
When the Ruff-Ruff Pack steals Mr. Porter's mini-donut maker, the Moto Pups set off to get the machine back in one piece; the Ruff-Ruff Pack takes over Humdinger's lair and runs off with his kitties.
Daring Danny X is harnessed over a canyon eating an Extreme Lunch when the wind blows him upside down; during Pie Swap Day in Adventure Bay, Humdinger sends Rocky Kitty to take one of Mr. Porter's delicious pies so he can join the contest.
Chase and Chickaletta switch bodies and must learn to work together to return Cap'n Turbot's boat to the bay; Mayor Humdinger creates robotic pants to cheat at the Most Amazing Athlete Contest, but his invention soon goes haywire.
Mayor Greatway needs her muddy motorcycle cleaned fast, so Wheeler and the pups jump into action to build a solution before the big race; it's Grandpa Gravel's special day, but when the pups are needed, they have to change their Grandpa Day plans.
The Goodways drift out to sea on a swan-shaped float and need rescue from a flock of real swans aiming to protect the giant inflatable; Mayor Humdinger steals Katie's Portable Pet Wash and ends up causing bubble trouble all over town.
When Mayor Humdinger runs for mayor of Adventure Bay, his Mayor Mobile runs out of control; when Ryder and the pups visit Tracker and Carlos in the jungle, a group of monkeys finds itself in sticky bubble trouble.
Bubble Bass avoids paying his bill at the Krusty Krab, so SpongeBob and Squidward are sent to collect the cash; Mr. Krabs makes Spongebob and Squidward cook a fancy meal for Mrs. Puff, but every dish becomes a dispute.
While buying romance novels for a heartbroken Ellen, Nate discovers they are total cash cows; under a pen name, he writes a bestselling graphic novel using the people in his life as inspiration until it catches up to him.
When the kids break Mom and Dad's priceless vase, they decide the only thing to do is go back in time to their wedding day and prevent them from ever receiving it.
Carl and Mike try to reconcile their partnership with couples counseling; after Peggy decides she won't participate in a promotional radio interview, Molly does it on her own.
Molly gives Mike a device that will track his activity in hopes of helping him get healthier and take better care of himself, but Mike has other plans.