Top 10 Greatest Cartoon Network Crossovers

While it isn't a crossover in the traditional sense (where characters directly interact with one another), 2007’s Cartoon Network Invaded event still implemented an overarching plot between a handful of shows. This timeblock saw several shows being invaded by aliens who plan to steal all of the cheese on Earth. This invasion spanned "Ed, Edd n Eddy", "Camp Lazlo", "My Gym Partner's a Monkey", "Foster's Home for Imaginary Friends", and "The Grim Adventures of Billy & Mandy". Overall, this indirect crossover was pretty neat, and it kept us in suspense long enough to finally see what the invaders looked like.

Admittedly, Radicles’ appearance in “Mighty Magiswords” falls somewhere between a crossover event and a cameo. He only shows up in the third act. But it’s still a lot of fun! In this series finale for “Mighty Magiswords”, Vambre and Prohyas bring Simone and Noville on a mission, but it ends up killing their friends’ interest in adventuring. Along the way, they encounter Radicles from “OK K.O.! Let’s Be Heroes”. Radicles even gets his own Magisword, which is actually K.O.’s arm and throws power cards!

"Teen Titans Go" may not be the most well-liked show on Cartoon Network, but this crossover with the underrated "Young Justice" made for a memorable episode! The Titans grow jealous of the Young Justice team after seeing them take down H.I.V.E. without a hitch. They decide that in order to be taken seriously, they'll have to get as serious as their rivals. It works about as well as you'd expect, given the Titans' track record in childish antics. And yet, we can't help cracking a smile when we see their ridiculously detailed and brooding faces! Even if you aren't a fan of the Titans' new image, this crossover is well worth your time.

This wasn't exactly a crossover we were dying to see, but it unexpectedly turned out pretty well. Steven is having quite a bit of trouble using his powers, particularly when it comes to summoning his shield bubble. Who better to save the day and fix a problem than the goofy and surreal Uncle Grandpa? Between the fourth-wall breaks and hilarious gags, "Say Uncle" was a surprisingly entertaining crossover for fans of both shows. And if you're still a little antsy over this shake-up, don't worry - Uncle Grandpa himself confirmed that nothing in the episode is canon.

Given how often the Red Guy appeared in both shows, it only made sense that they’d crossover. (Besides, “I Am Weasel” was originally a segment of “Cow and Chicken”). When someone has committed the heinous crime of erasing Cow and Chicken from the world, it’s up to Weasel and I.R. Baboon to crack the case! Of course, you can expect the same ridiculous humor from both shows to shine here, and the animation is as top-notch as it is on a normal day. Bet you can't guess who the culprit is!

This isn't the first time these shows have collided. (Anyone else remember "Grim & Evil"?) However, this was the first time they went beyond Easter eggs and cameos. Hector Con Carne has returned and is ready to take over the world, with his general Skarr at his side! Unfortunately, Skarr has gotten used to a quiet life and requires some convincing. What made this episode so special was that we got to revisit the short-lived “Evil Con Carne” series that premiered after “Grim & Evil” ended. So, this episode was a pleasant trip down Memory Lane!

The "Ben 10" franchise made a few more crossovers than most shows typically go for as we'll see later on. One of its coolest episodes was when Ben met the Secret Saturdays, a family that’s a part of a secret organization of scientists, specializing in capturing cryptids. As with most action shows, the encounter is not made under light circumstances; Dr. Animo has resurrected the sinister Vincent Argost, the Saturdays’ archenemy! Full of thrilling moments and witty one-liners, “T.G.I.S.” brought the best of both shows in one great package.

In "Crossover Nexus", K.O. finds himself trapped in a mysterious dimension . . . but he isn’t alone. Dozens of other characters from various Cartoon Network shows are in the same predicament, and they must all band together to break free! If you're a die-hard fan of Cartoon Network, you'd be gushing over how many references were packed into this episode! Featured are Ben from “Ben 10”, Raven from “Teen Titans Go!”, and Garnet from “Steven Universe”; but there are also many more, including relics of the network’s history. One could plainly see the amount of love poured into this massive crossover.

This may not have been a big surprise to see (this coming from the studio behind BOTH shows), but "Heroes United" was a thrilling adventure until the very end. After falling through a wormhole, Ben finds himself in Rex's world, and eventually, the two must team up to defeat a power-absorbing foe. There were just so many cool moments in this crossover, from Rex's fight with Humungosaur to Ben using Upgrade's powers to fuse with Rex's equipment. With interesting scenarios, compelling writing, and fantastic voice acting, this was one of the coolest specials Cartoon Network ever put out!

Not only was this the oddest of the bunch, it was also the best. When Billy tears his Dad's favorite pair of pants, he must call on the one group of kids that can help him out. Unfortunately, the Eds refuse, and so, the dilemma rests on the Kids Next Door. This was a sight to behold. Despite the stark contrast in both shows' visuals, the chemistry between characters made it seem like they’d been together since their pilots. Hilarious through and through, this was the crossover that riled up the kid in us all, and characters from many other shows made cameos too.