Gruffi burns the Great Book of Gummis and goes to Ursalia to find another to replace it. Their he meets Thornberry, a gummi who tries to save Ursalia from an evil witch, Lady Bane!!

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.

Zummi finds a section of the Great Book of Gummi that contains advanced magic spells. However, this also signals Zorlok, an evil wizard whom the Great Gummis had imprisoned in a subterranean prison, that he can find the unlocking spell, then be free to inflict violence on all Gummi Bears the world over, then conquer the world. To do this, Zorlok creates a monster to steal the Great Book, causing Zummi, Grammi and Gruffi needing to track it down.

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.

Calvin meets the Gummi Bears and asks if they will help stop Duke Igthorn from destroying Castle Dunwyn.

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.

After the egg of a griffin rolls free, Cubbi gets mistaken for the baby whilst Gruffi has to deal with the actual baby griffin who thinks he is his father. Can Gruffi and Cubbi make the switch without facing the wrath of the mother griffin?

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

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

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.

Igthorn comes into the possession of an invincible magical suit armor of an infamous villain from the past. Unfortunately, this armor fits diminutive Toadie only, and once the dwarfish Ogre realizes its power, he simply decides to take his Dukie's place as the ruler of Dunwyn!

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.

Sunni saves a squirrel-like shapechanger called a boggle, from a hungry wolf and takes it back home. But a shape-changer - not to mention a whole family of them - tends to make a rather tedious pet!

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?

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

Grammi finds what seems to be a Gummi forced to work as a side show and takes him home to Gummi Glen, but Gruffi thinks there is something wrong with him. Are Gruffi's suspicions correct, or have they found another Gummi Bear?

Gruffi & Grammi switch job places. Igthorn makes a machine to destroy Castle Dunwyn.

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?

When Lady Bane gets a lock of Sunni's hair, she uses it as part of a spell to keep her eternally young. Unfortunately, the spell also ages Sunni from a young Gummi to an old Gummi.

With no sign of Igthorn for an entire year, not even in his own castle, Zummi Gummi finds this news as a perfect opportunity to call on the Great Gummies (much to the skepticism of Gruffi). However, Igthorn has recently devised the ultimate plan to finally capture the Gummies, obtain the Gummiberry juice, and take over Dunwyn.

While trying to sneak out of his new diet, Tummi finds a stone ogre oracle and uses it to trick Duke Igthorn and the ogres with it.

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".

Cavin is having problems with knight training. Cubbi suggests an underground wishing stone could be a big help, but they soon learn the stone is guarded by a mean giant. Cavin and Cubbi must find several different ways to thwart to giant, until Cavin finally realizes being a knight is not always about strength.

The Trolls are on the loose again, and this time they've hijacked an ancient Gummi digging machine.

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.

A Slumber Sprite puts Gruffi to sleep, requiring Grammi and Cubbi to trek across hostile terrain to find the sprite and keep Gruffi from suffering nasty accidents.

Lured by the aroma of their daily baking, Tummi ends up in the company of human monks, is forced to protect the faithful friars from the thieving trolls, and finally learns to say no for his own good.

A Gigglin causes a practical joke spree in the Glen. Will this stop the dam from being built in time to stop the water from flooding in?

Igthorn purchases a love potion from a traveling gypsy to get Lady Bane around. But a severe accident instead makes Lady Bane fall in love with Toadie, and Tummi in love with Lady Bane!

Toadie impersonates the Crimson Avenger and learns what it means to be a hero.

When Gruffi breaks his foot, he stubbornly refuses to stay put, believing that the Glen would suffer if he doesn't remain active. His attitude doesn't improve when a rowdy bandit gang decides to make camp--right above the Gummi Glen abode.

Tummi fights a battle with his own self control when Duke Igthorn temps him with food.

King Gregor and Calla travel to the realm of King Jean-Claude and his daughter Marie to discuss an alliance against a fiendish villain, Marquis de Bouillabaisse, and Sunni, Cubbi and Tummi decide to hike along. However, once more Calla and Marie initiate a competitive quarrel, which leads them right into the arms of Bouillabaisse.

Sunni finds an old enchanted Gummi quilt which records the old Gummis' greatest achievements on its patches. In her eagerness to show it to Calla, she loses the quilt to Lady Bane, who promptly employs its magic to try and make herself queen of Dunwyn.

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.

Grammi tries to become a better cook and collects a number of strange roots for seasoning. Unfortunately, a trio of gnomes needs these roots to appease an everhungry, bullying monster, and Grammi decides to give that monster a taste of her house-made cooking.

Tummi takes pity on Doctor Dexter, an unsuccessfull pharmacist, and decides to improve his concocctions with a shot of Gummiberry juice. Unfortunately, this new wonder medicine also attracts the attention of Igthorn, and without the knowledge of how to exactly replicate the formula, the Doctor is caught between a rock and a hard place.

Grammi is visited by a childhood friend, Nogum.

Sir Gawain (Cavin's grandpa) tries to prove Gummies exist to win a bet.

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

Sunni wants to find a new place to live but finds that Gummi Glen is the best home for a Gummi Bear.

Sunni learns the importance of keeping Gummi traditions when a giant reawakens thanks to her carelessness.

Grammi believes it is time to teach another Gummi Bear how to make Gummiberry juice. Sunni is chosen as the most eligible candidate, but is more into fashion and spending time with Calla. The Ogres kidnap Grammi and take her to Castle Drekmore, where Duke Igthorn attempts to coax the recipe for Gummiberry juice from her. When the Gummis go on a rescue mission, they request Sunni to follow and bring some Gummiberry juice, which Sunni does not know how to make because she failed to pay attention to Grammi's lessons.

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.

King Gregor hosts King Jean-Claude, a ruler of a nearby Frankish kingdom, and his daughter Marie in order to improve diplomatic relations; but both Sunni and Calla learn that being a princess does not make one an instant sweet little girl. Even worse, Marie's haughty attitude eventually causes King Jean-Claude to stage a military siege on Dunwyn.

A traveler from the Orient searches out the Gummi Bears to honor an ancient pact of friendship and help concerning a dragon.

Duke Igthorn gets a magic bagpipe that hypnotizes whoever hears its music.

Grammi and Tummi go to feed a flock of giant birds just returning from their winter quarters, only to be forced to protect them from Igthorn hunting these birds to use them as war steeds and take care of one of their young at the same time!

Sunni enters a costume contest in Dunwyn during folly day.

Dunwyn's most famous paladin, Sir Victor, pays a visit to King Gregor's court. But the White Knight bears a secret which makes him an easy target for extortion by Igthorn.

While thwarting yet one more attempt of Igthorn to claim rulership, Sir Tuxford is injured, so Sir Victor is called in to defend Dunwyn for the period of Tuxford's recovery. However, soon Igthorn hits upon a plan to use his likeness to his twin brother to conquer Dunwyn after all ...

When Gusto invents a decoy to lure ogres away from Gummi Glen, it fools the ogres, but also attracts the humans, who start looking around the forest. It is up to Gruffi and Gusto to save the glen.

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?

Gruffi's head swells when Trolls complicate the delivery of a tree.

Tummi, Sunni, and Cubbi learn the secret recipe for their favorite sweet treat but run into trouble when they try to make it themselves.

Tummi becomes a magician with Cubbi's help.

Igthorn and Tummi switch bodies on Tummi's birthday.

In his clumsiness, Sir Thornberry inadvertently releases the Spinster, an old menace of the Gummi Bears, and now he is his friends' best hope of escaping this monster before it makes dinner out of them.