Summary
Highlights
The 'Crossover Nexus' special for OK K.O.! Let's Be Heroes premiered on Cartoon Network and was immediately striking, even skipping the usual theme song to maximize runtime. The premise involves heroes from different CN shows uniting against 'Strike' in the ruined CN City from a much older era.
Events unfold quickly as K.O., Garnet, and Ben 10 meet and showcase their abilities. The true scale of the crossover is revealed when they encounter numerous striked Cartoon Network heroes. The video points out a 'Nu Nu Nu Nu' reference from Ben 10, a nod to old CN marketing, and a poster for The Powerpuff Girls with 'Har Har Tharsdays' written below, an old CN block.
Many classic Cartoon Network characters are shown to be 'striked,' including Yumi, Robot Jones, Chowder, High Five Ghost, Weasel, Schnitzel, Ilana, Moxie, Festro, Dexter, One-One (from the unreleased Infinity Train), Juniper Lee, Frankie, Jake (from My Gym Partner's a Monkey), Double D, Alf, Grimm, Octus, Duncan Rosenblatt, Chicken, K'nuckles, Courage, and Periwinkle.
The list of cameos continues with Carl (Johnny Bravo), Charles and Larry (Time Squad), Major Dr. Ghastly (Evil Con Carne), Number 5 (Kids Next Door), Blastus (Robotomy), and graffiti spelling out 'Cartoon Cartoon,' a reference to Cartoon Network's classic programming block, 'Cartoon Cartoon Fridays.' Other references include shows like Victor and Valentino, Squirrel Boy, Camp Lazlo, Adventure Time, and an obscure character named Aaron from a 2004 block called 'MagooZ.'
Further Easter eggs include graffiti for 'Cartoon Orbit Showds,' Sheep in the Big City, Jeff (Clarence), a second Double D reference, posters for various shows, Lou (Mike, Lu & Og), King Rufus (Long Live the Royals), Golly Gopher, Greg (Over the Garden Wall), Monkey (Dexter's Lab), and Black Hat (Villainous). Ben 10 transforms into Jake from Adventure Time, and then various classic characters with changing backgrounds, culminating in Finn, who breaks Strike's arm, referencing his own arm loss in Adventure Time.
The Cartoon Network City is restored to its original state, filled with 'Noods' from the 2008-2010 era. Iconic buildings like the Kids Next Door treehouse, Chowder's catering, Townsville Hall, the Regular Show house, Adventure Time treehouse, and the Billy and Mandy house are visible. The video concludes by praising the special for its abundance of references and calling it the best Cartoon Network crossover in a long time.