A sculptor changes all the Gummies except for Gruffi and Grammi into statues with magic dust. Meanwhile, Gruffi and Grammi are frequently fighting and don't want to work together. King Gregor then buys the statues for Princess Calla. So it's up to Gruffi, Grammi and Cavin to turn the others back to normal. Can they do it, or will Gruffi and Grammi's arguing get in the way?

The Gummis are nearly out of Gummiberry juice so Grammi needs to make more, but the spigot is stuck so Zummi, Grammi, Cubbi, and Cavin go to the pumping station to fix the problem. But they discover that the facility is near a maritime boundary that separates Dunwyn and Drekmore – where Duke Igthorn and his ogres live. They only have four bottles of Gummiberry juice left, that's one for each of them. Can they fix the problem and get back home safely to Gummi Glen without being noticed by the ogres?

A bird threatens the Gummiberry bushes and nobody will listen to Cubbi's ideas to get rid of it.

Tummi accidently causes a swarm of bugs to attack the gummiberry bushes.

When the castle of the knights of Gummadoon appears, Cavin is imprisoned as a spy. The Gummies only have until sunset to rescue him, as the castle only appears once every hundred years, but they also have to contend with Duke Igthorn, who plans to capture the castle.

Duke Igthorn meets Lady Bane for the first time and falls in love.

Igthorn and his ogres have destroyed Gummi Glen, captured Dunwyn Kingdom and its citizens, and are keeping Grammi and Tummi held in Drekmore. Now Cavin and the remaining Gummies, with the help of the Barbics, must save them all while Zummi retrieves the Great Book and warn the Great Gummies to turn back.

Duke Igthorn sends a cursed gargoyle to King Gregor. The gargoyle comes alive at night and starts trying to destroy things – including the king himself.

While exploring an ancient storeroom of the Great Gummis, Tummi discovers a mechanical decoy used to make dragon footprints, but accidentally starts the ignition on the machine and begins bouncing all across the land. The footprints attract a real dragon who proves to be different from the stereotype of large dragons. The knights of Dunwyn also see the machine and think it is a real dragon.

Zummi gives Cubbi a whistle from his old treasure chest while Sunni is having trouble babysitting Cubbi. The whistle attracts a brine dragon, which takes Sunni and Cubbi on an unexpected adventure to Drekmore Castle.

Sunni is kidnapped by a flock of ugly bird-like creatures known as Carpies, whose king wants her for a song bird. The Gummis (Gruffi, Zummi, and Cubbi) must use their new flying machine to get to the top of the mountain and rescue her, all whiledealing with Zummi's acrophobia and Gruffi's insistence that "Gummis were not meant to fly".

Zummi makes a magic hat for Sunni, which can change her appearance to anyone she wants by speaking that person's name, and Sunni turns herself into Princess Calla to enjoy the comforts of royalty. Coincidentally, the real Princess Calla is kidnapped by Igthorn while going outside Dunwyn's castle walls. When the two princess contestants meet in a Drekmore tower cell, what will happen once the true princess exerts her right of existence?

Tummi learns through his new friend, the blind shepherd Trina, that handicapped people are not helpless.

Duke Igthorn catapults Toadie into the forest, where he accidentally makes his way into Gummi Glen and begins snooping around. When Tummi, who has been caught eating the other bears' picnic lunches and lying about it, sees him, no one believes him when he tries to tell them.

The Gummies find a Gummiscope, a gigantic machine that harnesses sunlight as a means of long-range communication, that could allow them to make contact with the Great Gummis across the ocean – but it can also be used as a weapon, causing Duke Igthorn to use it as a laser-type weapon to force King Gregor into surrender.

Chummi Gummi comes to Gummi Glen in search of the Great Gummis. When he finds there not there he goes to search for them. Cubbi wants to leave with him so he can become a knight.

When Cubbi claims he is serious about Calla's knighthood from "Up, Up & Away", the annoyed Gummis suggest he go into the forest to be a hero. After saving some people, Cubbi gets the reputation as "the Crimson Avenger". Although Cubbi has done a good job by protecting people from a highwayman trying to rob them, the thief elects to move into Dunwyn Castle - along with chances for juicier crimes, which end up causing problems for Calla, Cavin and King Gregor.

When Cubbi claims he is serious about Calla's knighthood from "Up, Up & Away", the annoyed Gummis suggest he go into the forest to be a hero. After saving some people, Cubbi gets the reputation as "the Crimson Avenger". Although Cubbi has done a good job by protecting people from a highwayman trying to rob them, the thief elects to move into Dunwyn Castle - along with chances for juicier crimes, which end up causing problems for Calla, Cavin and King Gregor.

Sunni creates a growing potion while Toadie is cast out by Duke Igthorn. The two meet to unexpected results.

There is a thief in Gummi Glen, so Zummi and Grammi team up to find the rat. Unfortunately, Zummi casts the wrong spell which ends up shrinking them to a dimunative size, and they only have a limited amount of time to reverse it.

After an autumn of hard work and preparation for the coming winter, the Gummis are looking forward to the holiday of Fall's Farewell, but Sunni goes overboard with the celebration trying to impress Calla.

Tummi builds a full size boat, which Gruffi wants scuttled. However, out of respect for all the work done, he allows Tummi one sailing trip. This trip takes an unexpected turn when they end up on a volcanic island inhabited only by another Gummi Bear - an artist by the name of Gusto.

Something is fishy when Sunni is jealous of Gusto's new friend Aquairanne.

A ghost of a Gummi knight leads Cubbi on a quest.

King Gregor proposes a series of tests for Unwin and the other squires to become Princess Calla's bodyguard, which includes stealing a golden apple from the strong and mysterious Black Knight. Calla conceals her appearance in a suit of armor and competes as well to prove she is capable of her own self defense.