The Crossover Adventure! is created by Christinahorst.2018. Nikki eventually returns to Danville, but with some bad news: Doofenshmirtz is going to blow up the world! Phineas didn't think he, Ferb, Nikki, Isabella, Buford, Baljeet and Perry made a big enough team, so the characters of Total Drama, SpongeBob SquarePants, The Powerpuff Girls, and Fanboy and Chum Chum help. Can they all defeat Doofenshmirtz and save the world?