What is ben 10 fanfiction crossover?

Ben 10 fanfiction crossovers involve blending characters, concepts, and storylines from the Ben 10 franchise with other popular franchises. These crossovers often feature Ben Tennyson and his allies encountering characters and villains from other universes, such as the DC Universe, Marvel Universe, or Star Wars Universe. Some crossovers involve Ben gaining new abilities or forms by interacting with the new universe's technology or magic. Other crossovers explore alternative timelines or universes where Ben's story takes a different path due to the intervention of characters from other franchises. Ben 10 fanfiction crossovers can be found on fan fiction websites such as FanFiction.net and Archive of Our Own.