Chummi is the last Gummi from Gummerset, having outlived the other Gummies of his colony when he grew up, due to being the youngest.
He travels to Gummi Glen with his airship, to find the hundreds of Gummies, but only finds six. He easily befriends them all, but is most fond of Cubbi, as he relates to the youngster after having been the youngest among his peers as well. Realizing the possibility of Cubbi becoming to last Gummi of Gummi Glen, Chummi offers to take all the Gummi Glen Gummies with him to New Gumbria, aboard his airship.
His generous offer is initially accepted. Eventually however, the Gummies realized that they do not want to abandon their caretaker duties and just leave their ancestral home behind. Only Cubbi chooses to make the journey, hoping to finally get the chance to be trained as a Gummi knight upon arrival across the ocean.
During the journey, Chummi's airship is taken down over Drekmore Castle by Duke Igthorn and his Ogres, who seek to use it as a war machine against Dunwyn Castle.
Thankfully, with help from the Gummies of Gummi Glen, Chummi gets his airship back and together they thwart Igthorn's scheme. By this time, Cubbi has decided against leaving, and returns home. Chummi continues his journey across the ocean, promising to inform the Great Gummies about the existence of the Gummies of Gummi Glen.
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"
