OK .KO.! Let's Be Heroes

Steven Universe

Garnet is seen with Ben and Raven in the episode Crossover Nexus.

Sonic the Hedgehog (1913)

In the episode Let's meet Sonic Ko and sonic are in a crossover episode together.

Characters

 * K.O.
 * Mr. Gar (mentioned, poster)
 * Garnet
 * Raven
 * Ben Tennyson
 * Four Arms
 * Strike
 * Steven Universe (imagined, gemstone in original storyboard)
 * Pearl (imagined)
 * Amethyst (imagined)
 * Robin (shadow cameo)
 * Starfire (shadow cameo)
 * Cyborg (shadow cameo, body in original storyboard)
 * Beast Boy (shadow cameo; mentioned)
 * Grandpa Max (mentioned)
 * Gwen Tennyson (mentioned, head in original storyboard)
 * I.M. Weasel (stone and reanimated cameo)
 * Yumi (stone and reanimated cameo)
 * Chowder (stone and reanimated cameo; Ben's transformation)
 * Schnitzel (stone and reanimated cameo)
 * Edd (Double D) (stone cameo; Ben's transformation)
 * Moxy (stone and reanimated cameo; Ben's transformation)
 * Finn the Human (Ben's transformation)
 * Jake the Dog (watch cameo; stone cameo, Ben's transformation)
 * Mordecai (Ben's transformation)
 * Hi-Five Ghost (stone and reanimated cameo)
 * Buttercup (Ben's transformation)
 * Talking Dog (stone cameo)
 * Prohyas Warrior (watch cameo; stone cameo; Ben's transformation)
 * Gumball (stone cameo; Ben's transformation)
 * Festro (stone and reanimated cameo; Ben's transformation)
 * Uncle Grandpa (Ben's transformation)
 * Robot Jones (stone and reanimated cameo; Ben's transformation)
 * Kelsey (stone cameo)
 * Mortimer (stone cameo)
 * Ilana (stone and reanimated cameo)
 * Octus (stone cameo)
 * Frankie (stone cameo)
 * Juniper Lee (stone cameo)
 * Black Hat (stone cameo)
 * Golly Gopher (stone cameo)
 * Mao Mao (stone cameo)[4]
 * Larry 3000 (stone cameo)
 * Lu (stone cameo)
 * Wirt (Ben's transformation)
 * Gregory (stone cameo)
 * Jason Funderburker (stone cameo)
 * Sheep (stone cameo)
 * Captain K'nuckles (stone cameo; Ben's Transformation)
 * Grim (stone cameo, Ben's Transformation)
 * Courage (stone cameo)
 * Supercow (Ben's transformation)
 * Chicken (stone cameo)
 * Grizzly (stone cameo; Ben's transformation)
 * Dexter (Ben's transformation)
 * Monkey (stone cameo; Ben's transformation)
 * Jeff (stone cameo; Ben's transformation)
 * Jorel's Brother (stone cameo)
 * Johnny Bravo (Ben's transformation)
 * Carl (stone cameo)
 * Lazlo (stone cameo)
 * Jake Spidermonkey (stone cameo)
 * Numbuh 5 (stone cameo)
 * Erin (stone cameo)
 * Kiva Andru (stone cameo)
 * Duncan Rosenblatt (stone cameo)
 * One-One (stone cameo)
 * Tiggy (stone cameo)
 * Generator Rex (stone cameo)
 * Major Dr. Ghastly (stone cameo)
 * Apple (stone cameo)
 * Rodney J. Squirrel (stone cameo)
 * Hedgehog (stone cameo)
 * King Rufus (stone cameo)
 * Valentino (stone cameo)
 * Blastus (stone cameo)
 * Alfe (stone cameo)
 * Periwinkle (stone cameo)
 * Two characters from The Fungies (stone cameo)
 * Noods (reanimated cameo)
 * Toonix (cameo)
 * Clyde 49 (cameo)
 * SuperChunk Kid (cameo)

Original Storyboards

 * Enid (legs)
 * Ruby
 * Sapphire
 * Connie Maheswaran (original Crystal Gems image cloud)
 * Peridot (original Crystal Gems image cloud)
 * Stickman
 * Li'l D (stone cameo)
 * An unknown The Secret Saturdays character (stone cameo