Due to the chaos wreaked by Taurus Bulba with the Ramrod, the Staff of Sarcanas found its way into the world of Steven Universe and with it, the resurrection of the Storm King thanks to some leftover Gem technology getting caught in the storm it created. After encountering Aquamarine & Eyeball, the three villains decide to team up along with General Lunaris & Adagio Dazzle to all get revenge; forcing the heroes of Beach City, Duckburg and Equestria to team up to save their worlds.

Meanwhile, Gladstone Gander, Fethry Duck and Shining Armor hang out in the "Not Invited to the Adventure" corner.

Steven Universe Pair Units

Steven and Connie
Garnet and Amethyst
Pearl and Bismuth
Peridot and Lapis Lazuli
Jasper and Spinel
Greg and Lion

Ducktales Pair Units

Scrooge and Donald
Huey and Louie
Dewey and Webby
Launchpad and Mrs. Beakley
Lena and Violet
Gyro and Fenton

My Little Pony Pair Units

Twilight Sparkle and Starlight Glimmer
Rainbow Dash and Fluttershy
Pinkie Pie and Applejack
Rarity and Fluttershy
Trixie and Discord
Celestia and Luna

Crossover Units

Lars and Della
Penumbra and Tempest Shadow
Ember and Topaz
Nephrite and Darkwing Duck
Boyd and Thorax
Cadence and Sadie

Solo Units

Yellow Diamond
Blue Diamond
White Diamond
Rhodonite
Fluorite
Padparadscha Sapphire
Rutile
Cactus Steven
Duckworth
Goldie O'Gilt
Storkules
Faris D'jinn
Gabby McStabberson
José Carioca
Panchito Pistoles
Gosalyn Waddlemeyer
Cutie Mark Crusaders
Sandbar
Yona
Ocellus
Silverstream
Gallus
Smolder
Sunset Shimmer