Nickelodeon The 10 Best Crossovers Ranked CBRAnimation crossovers combine popular characters from distinct cartoons, creating exciting partnerships. These one-of-a-kind mashups provide a novel view and allow fans to live their toon idols in unprecedented ways. From epic battles to hilarious adventures, toon crossings seize the imagination and fuel our longing for childhood. So get ready for a unpredictable ride as your favorite toon worlds meet in unexpected ways!