Gusto was an artistic, individualistic Gummi Bear was was born in an unknown warren similar to Gummi Glen. One day, he set sail for a deserted island. Although Gusto had only intended to paint the beach, his stay extended to twelve years when oceanic activity destroyed the beach and trapped Gusto on the island. During this time he befriended an island native named Artie Deco, a wise talking toucan.
Tummi and Gruffi were shipwrecked on Gusto's island, just as a volcano was due to erupt and cause the island to sink into the sea. The three bears worked together and brought Gusto home with them to Gummi Glen in the season 2 finale.
Gusto's personality is mercurial, in sharp contrast to Gruffi's desire to be steady and "do things the Gummi way". Gruffi tends to argue with Gusto for his outside-the-box thinking, and how much influence he is on Cubbi and Sunni, although there are times when Gusto's uniqueness saves the day, such as figuring out how to escape the island. He lives by himself in a makeshift apartment behind a waterfall, but lives in Gummi Glen when the weather is too harsh.
In "Day of the Beevilweevils", the Gummiberry crops are destroyed. Gusto attempts to replace them by setting out for a place called South Gumton, which was unknown to the Gummi Glen Gummies. Gusto explains that growing up in his warren, they knew of South Gumton, which was supposed to be a farming community.
Season One: "A New Beginning" • "The Sinister Sculptor/Zummi Makes it Hot" • "Someday My Prints Will Come/Can I Keep Him?" • "A Gummi in a Gilded Cage" • "The Oracle/When You Wish Upon a Stone" • "A Gummi by Any Other Name" • "Loopy, Go Home/A-Hunting We Will Go" • "The Fence Sitter/Night of the Gargoyle" • "The Secret of the Juice" • "Sweet and Sour Gruffi/Duel of the Wizards" • "What You See is Me/Toadie's Wild Ride" • "Bubble Trouble/Gummi in a Strange Land" • "Light Makes Right"
Season Two: "Up, Up, and Away" • "Faster Than a Speeding Tummi/For a Few Sovereigns More" • "Over the River and Through the Trolls/You Snooze, You Lose" • "The Crimson Avenger" • "A Hard Dazed Knight/Do Unto Ogres" • "For Whom the Spell Holds" • "Little Bears Lost/Guess Who's Gumming to Dinner?" • "My Gummi Lies Over the Ocean" Season Three: "Too Many Cooks/Just a Tad Smarter" • "If I Were You/Eye of the Beholder" • "Presto Gummo/A Tree Grows in Dunwyn" • "Day of the Beevilweevils" • "Water Way to Go/Close Encounters of the Gummi Kind" • "Snows Your Old Man/Boggling the Bears" • "The Knights of Gummadoon" • "Mirthy Me/Gummi Dearest" Season Four: "The Magnificent Seven Gummies" • "Music Hath Charms/Dress for Success" • "A Knight to Remember/Gummies Just Want to Have Fun" • "Color Me Gummi/There's No Place Like Home" • "He Who Laughs Last" • "Tummi's Last Stand/The Crimson Avenger Strikes Again" • "Ogre Baby Boom/The White Knight" • "Girl's Knight Out/Good Neighbor Gummi" • "Top Gum/Gummi's At Sea" Season Five: "The Road to Ursalia" • "Let Sleeping Giants Lie/A Gummi a Day Keeps the Doctor Away" • "Life of the Party/Bridge on the River Gummi" • "My Kingdom for a Pie/The World According to Gusto" • "Ogre for a Day" • "Princess Problems/A Gummi is a Gummi's Best Friend" • "Beg, Burrow and Steal" Season Six: "Return to Ursalia" • "Never Give a Gummi an Even Break" • "A Gummi's Work is Never Done" • "Friar Tum" • "Tuxford's Turnaround" • "Toadie the Conqueror" • "Zummi in Slumberland" • "Patchwork Gummi/Once More, the Crimson Avenger" • "Thornberry to the Rescue" • "A Recipe for Trouble" • "Queen of the Carpies" • "True Gritty" • "King Igthorn" • "Tummi Trouble" • "Rocking Chair Bear" • "Trading Faces" • "May the Best Princess Win" • "Wings Over Dunwyn" • "The Rite Stuff"
Original Worlds:Destiny Islands • Traverse Town • Radiant Garden/Hollow Bastion • Disney Castle/Disney Town/Timeless River • Dive to the Heart • End of the World • Realm of Darkness • Twilight Town/Mysterious Tower • The World That Never Was • Castle That Never Was • Land of Departure/Castle Oblivion • Keyblade Graveyard • Daybreak Town/Scala ad Caelum
