Alex-Zero: Heroes Through Worlds

Alex-Zero: Heroes Through Worlds is a crossover between Alex Rider and Zero Hero made by Rex and Solo.

Summary
Alex is fighting a demon-alien thing and it travels into hyperspace. Alex follows it, but gets trapped in a surronding Universe, Zero's. They think each other is the enemy and fight, only to get broken up by the demon from before. Then, they fight him and get beaten. The Demon flies away to get a large power core to destroy the Universe. Can The two sixteen-year olds stop him.