OK Ben Let's Go Universe!

K.O., Garnet, Ben, and Raven

"Crossover Nexus" is the 24th episode of Season 2 of OK K.O.! Let's Be Heroes and the 76th episode overall. It is a crossover episode that features Garnet from Steven Universe, Ben from Ben 10, and Raven from Teen Titans Go![2]

Official Synopsis

When KO finds himself trapped inside an mysterious place, he encounters other Cartoon Network Heroes and they band together to escape.[3]


In a destroyed city, two shadowed heroes are being attacked by a villain named Strike. Fed up by their hiding, he summons K.O. to eliminate instead. Just as he's about to destroy him, one of the shadowed heroes saves him, revealing herself to be Garnet. The other shadowed hero is Ben 10, and they run. Strike sends his blaster after them. After brief introductions, the blaster engages them. Ben turns into Four-Arms and pushes it back. The blaster retaliates by blasting off his Omnitrix, preventing him from turning back. Garnet also loses her visor, which enabled her to focus her future vision (and were prescription). The three escape and manage to temporarily bring down the blaster.

Escaping into an abandoned building, they find numerous other heroes they've never seen (all from 1990s and 2000s CN shows), encased in stone with red X's on them. They do find one hero named Raven, who managed to survive Strike's attack due to a protection spell. She explains that the city they're in used to be a bustling utopia for all sorts of heroes until Strike showed up to destroy all of them, stealing their powers. He then began summoning heroes to destroy from other dimensions which he does with ease. Raven has also lost most of her powers, only being able to levitate. The four decide to attack Strike's lair head on, even forming their team name: "O.K. Ben Let's Go Universe" along the way.

Using Raven's levitation and Garnet and K.O's punches, they evade traps and monsters sent by Strike and make it to his lair. The Medusa Canon shows up once more and corners them. Strike arrives and begins powering up. K.O. uses this opportunity to grab the Medusa Canon, figuring that its appearance as a pen would indicate it could create as well as destroy. K.O. restores his new friends' powers and they engage Strike. He sends X energy blasts down that Garnet deflects with rapid-fire gauntlet strikes and future vision, while Raven uses a blast of dark energy.

When Ben tries to change, he only changes into two of the various heroes he saw before. K.O. explains that when he used the Medusa Canon to restore the Omnitrix, the powers that Strike has stolen came with it. K.O. then uses a power fist to launch Ben at the stunned Strike. Ben then transforms into many heroes as he delivers a devastating final hit, destroying Strike. Garnet reprograms the blaster, and the city, as well as all the heroes, are restored by it.

Raven opens portals to their home dimensions, and Ben and Raven both depart. Before Garnet leaves she uses the blaster to create a POW card of herself for K.O. and leaves for her home dimension. K.O. returns to his home and wakes up in Gar's Bodega. Initially believing that he was dreaming, he then discovers the Garnet POW card, realizing that the recent events were true.



Original Storyboards



Version 1:

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Version 2:

<soundcloud url="https://soundcloud.com/mintpotion/okko-music-ep-072-crossover" height="100" width="500"/>


  • This episode is dedicated to Cartoon Network and its 25th Anniversary.
  • This episode was announced at San Diego Comic-Con on July 21, 2018.
  • This episode is ninth crossover special of Cartoon Network, as well as the third for OK K.O.! Let's Be Heroes, after "The Power Is Yours!" and "Monster Party".
  • This episode is based on several cartoon crossover specials Ian Jones-Quartey had watched when he was younger.[6]
  • Parker Simmons, who had left the show after "Your World is an Illusion" and briefly returned to the show to contribute to the special.[7]
  • The episode had the cooperation of many creators and boarders from the shows, as well as the original voice actors for the characters.[8]
  • The setting for the crossover is CN City, which was featured in a series of bumpers from 2004 to 2007, and hasn't been seen since 2007 (with international CN channels retiring it as late as 2010), yet has seen some offscreen in-universe expansion and redevelopment, as evidenced by the appearance of the Noods, Finn & Jake's Treehouse, etc. until it got destroyed and abandoned before the events of the special, where it was subsequently rebuilt by the end.
  • Logos for Cartoon Cartoons, Fridays, Cartoon PlanetTickle U, Shorties, JBVO, Har Har Tharsdays, and Yes! can be seen.
  • The current CN logo is used in the title card of the episode instead of saying Cartoon Network it now says Crossover Nexus.
  • This episode marks the first and so far only time that Moxy, host of The Moxy Show, has been acknowledged by an official Cartoon Network product since 2002.
  • Periwinkle from Periwinkle Around the World, from the Sunday Pants anthology series, can be seen.
  • The themes for Cartoon Cartoons, CN City, and NEW NEW NEW NEW can be heard.
  • When Ben briefly turns into Buttercup, her design is that of the original show instead of her reboot design.
  • The Noods from the Nood era can also be seen, along with their counterpart in other countries, Toonix.
  • Some characters that appeared are not from a Cartoon Network original, HBO Max original, or created from Cartoon Network in the US:
    • Two Cartoon Network's Latin American co-productions, Jorel's Brother (title character), and Villainous (Black Hat) can be seen, most likely due to Ian Jones-Quartey, visited Brazil in 2017, for Comic-Con Experience, to do a live drawing with the creator of Jorel's Brother, Juliano Enrico.
      • Black Hat's appearance among the heroes is strange, as despite being the protagonist of his series, he is still a villain.
        • However, in the episode of "Videos of Guidance for villains: Blackhat Organization Q & A", Dr. Flug confirms that the Black Hat that appears in this episode is a clone that appeared in the short "The Perception of Evil". Alan Ituriel also said in a youtube stream that the blaster is a Black Hat Org. product, and Black Hat's clone was used for target practice.
  • Golly Gopher from Re-Animated and its spin-off Out of Jimmy's Head is the only character to come from a live-action/animated CN production.
  • The Teen Titans, Rex Salazar (Generator Rex), and Duncan Rosenblatt (Firebreather) are the only non-original Cartoon Network characters to appear in this special, as these incarnations of the characters are based on those originally published by DC Comics and Image Comics respectively.
  • The scene where CN City is in desolation and the Cartoon Network characters are turned into stone might be a reference to the 1985 Disney film, Return to Oz.
  • Clyde 49 (the original mascot of Toonami when it launched in 1997) can be seen amongst the graffiti; Ghost Planet Industries also makes a very small appearance at the end when CN City is restored, floating high above the city.
  • The only Cartoon Network original shows that do not appear are What a Cartoon!, Star Wars: Clone Wars (due to Disney owning the rights to the Star Wars franchise), Class of 3000, Transformers: Animated, The Secret Saturdays, all pre-2017 Ben 10 original continuity, and Mixels (which is co-owned by LEGO).
    • All Cartoon Network live-action shows besides Out of Jimmy's Head, and any co-productions also do not appear.
  • Posters from other Cartoon Network shows can be seen.
  • The Buzz Wagon from Wacky Races can be seen in the parking lot of the studio building when the city is restored.
  • When Ben rapidly transforms into many different heroes to beat Strike, it is a direct reference to the series finale of Ben 10: Omniverse when Ben transforms into all of his aliens in order to shoot a beam at Maltruant without destroying himself in the process.
    • The scene also takes inspiration from Speed Racer (2008).[9]
  • In this episode, Ben has the Season 3 version of the Omnitrix even though this episode aired prior to the Season 2 finale of Ben 10, "Innervasion", in the US.
  • Teen Titans Go! is the only guest series to appear, having been licensed from Warner Bros. Animation and DC Entertainment.
  • Garnet doesn't have her wedding rings in the episode, despite it having aired after the Steven Universe episode "Reunited" in the US.
  • The episode also marks the very first and currently only time that Firebreather, Robotomy, and Sunday Pants were all completely acknowledged by an official Cartoon Network product.
  • Sunjae Lee previously worked as animation director on Steven Universe for two episodes in Season 1B when he worked at SunMin Image Pictures.
  • When this episode was played on September 7, 2019 after Steven Universe: The Movie, the split-screen credits used the credits from Teen Titans Go! instead of the episode's credits.
  • To this day, this was so far the only piece of Cartoon Network media to feature CN City.

Production Notes

  • According to Ian Jones-Quartey, the idea of the episode came from the idea of having cameos of hero characters from different Cartoon Network shows during the "Point Prep" arc. The episode was originally going to be a 22-minute special that would follow the same premise as the final version but would meet Ruby and Sapphire before meeting Garnet and would battle each other before teaming up, as well as them facing the evil Red Pen which was later re-worked as Strike's drone.[10] But after the storyboard was completed, Cartoon Network wanted the episode to be reduced 11-minutes, so most of the planned scenes were dropped an the entire idea was reworked to have the setting taken place in "CN City", the fictional setting for the series of Cartoon Network bumpers that aired simultaneously from 2004 to 2007, as well as using numerous Primal Screen's library of backgrounds from the networks' past bumpers as reference. The process of implanting the cameo appearances of the past and present Cartoon Network programs was a lengthy process due to legal rights and locating official model and artwork for the characters to make their cameos and design more accurate to their original forms. Some show cameos such as Class of 3000 and The Secret Saturdays were not shown in the final as they were in scenes no longer on the final production. CN worked with the Teen Titans Go! crew at Warner Bros. Animation to get all the proper references and sound effects needed for Raven. Mint Point Studios composed the episodes' score using selective Cartoon Network jingles as their motif for the episode.[11]
  • In another behind the scenes twitter thread from Iggy Craig for part two, Raven gets possessed by evil ink from the red pen and K.O. draws a new hero into existence that's just all their friends smashed together, which composed of Gwen's head, Cyborg's body, Steven's gem, and Enid's legs. The "new hero" squeezes the ink out of Raven. K.O. uses the Cartoon Punch with Ben ultimately became Finn to defeat the pen. Then, the pen and a heroic pencil teaming up at the end to draw "Stickman", a stick figure with huge muscular arms that was scrapped from the final version that congratulates the team for being a good team.[12]
  • Its production code, 1064-074 was an artifact of the half-hour version and doesn't accurately reflect when the 11-minute version was boarded which a couple of episodes (i.e. "Monster Party", "CarolQuest", "Plaza Alone", etc.) were done before the 11-minute version. The leftover 1064-075 (originally the second half of the crossover) production code was reused later in the season for parts of another episode.[13]
    • It is later revealed that 1064-075 was for part two of the season two finale "Dark Plaza".
    • The production of the elven minute version of the episode was completed before "Whacky Jaxxyz".
  • Parker Simmons (who wasn't involved in the original 22-minute version of the special) was the primary storyboard artist on the final 11-minute version; the scenes from the other storyboard artists were all taken from the 22-minute version and then stitched together and (when necessary) reworked by Parker.[14]
  • According to Ryan Cecil Smith and Ian Jones-Quartey, the original 22-minute version never got past the storyboard phase.[15][16]


  • In the Crystal Gems' cameo, Amethyst's outfit is colored with the colors of her second regeneration instead of her third.
  • In the same shot, Pearl's star is azure instead of a greenish yellow, and the tail from her waistband doesn't appear.
  • When Garnet and K.O. punch the piranha, Garnet's glove covers her whole hand instead of just her middle finger.


Best of Comic-Con, Pt. 2 Steven Universe OK K.O.! Let's Be Heroes Cartoon Network This Week
OK K.O.! Let’s Be Heroes The Hero Mashup Cartoon Network
OK K.O.! Let’s Be Heroes Character Crossover Mashup Cartoon Network
OK K.O. Let's Be Heroes! The Big Crossover Cartoon Network


Click to view the gallery for
Crossover Nexus.


View the episode's transcript here.

Reference Sources

Pilot Lakewood Plaza Turbo
Shorts KOEnidRadCarolEnid's Bad DayBarrels and CratesRad CriesRad's VanCommercialPower-Up!!!DendyBoxmore InfomercialLet's Do It Together!
Season 1 A: Let's Be HeroesLet's Be FriendsYou're Everybody's SidekickWe Messed UpJethro's All YoursYou're Level 100!I Am DendySibling RivalryYou Get MeDo You Have Any More in the Back?Just Be a PebblePresenting Joe CuppaMy Dad Can Beat Up Your DadWe've Got PestsYou Are RadLegends of Mr. GarWe Got HackedPlazalympicsWe're CapturedKnow Your MomFace Your FearsEverybody Likes Rad?You Have to CarePlaza PromT.K.O.

B: Stop Attacking the PlazaPlaza ShortsWe've Got FleasOne Last ScoreSecond First DateNo More Pow CardsLet's Watch the PilotA Hero's FateGlory DaysParents DayLet's Have a StakeoutThe Power Is Yours!Rad Likes RobotsKO's Video ChannelVillains' Night OutVillains' Night InBack in Red ActionOK Dendy! Let's Be K.O.!Let's Take a MomentRMS & Brandon's First EpisodeMystery Science Fair 201XLet's Not Be SkeletonsLad & LogicAction NewsYou're in Control

Season 2 A: Seasons ChangeLord Cowboy DarrellHope This FliesThe Perfect MealPlaza Film FestivalBe a TeamMy Fair CarolPoint to the PlazaThe So-Bad-icalLet's Watch the Boxmore ShowYour World is an IllusionRed Action to the FutureTKO's HouseSpecial DeliveryDendy's PowerWisdom, Strength, and CharismaBittersweet RivalsAre You Ready for Some Megafootball?!Mystery SleepoverFinal Exams

B: Soda GenieCarolQuestBoxman CrashesCrossover NexusPlaza AloneAll in the VillainyMonster PartyGarQuestSuper Black FridayWhacky JaxxyzSidekick ScoutsProject Ray WayI Am JethroBeach EpisodeRad's Alien SicknessKO's Health WeekGar Trains Punching JudyOK A.U.!Dark Plaza

Season 3 We Are HeroesKO, Rad, and Enid!Let's Meet SonicTKO Rules!K.O. vs. FinkChip's DamageThe K.O. TrapWhatever Happened to... Rippy Roo?Planet XDeep Space VacationBig RevealRadical RescueYou're a Good Friend, KOLet's Get ShadowyRed Action 3: Grudgement DayCarlDendy's Video ChannelLet's Fight to the EndThank You for Watching the Show
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