#plot revealed

So, in Super Mario 3D World, Peach is the one who goes off to save the fairies, everyone else is just like wtf is going on. Now, after displaying their plumbing skills, a fairy comes along, whom happens to be a plumber as well. Bowser kidnaps all the plumber fairies, and appears to be loaded in cash, having a train and a new car. What if Mario and Luigi hired Bowser to stop their competition? They certainly have built up the funds to pay him off. They certainly weren't too enthusiastic about going to save them, and only expressed interest in following the princess and each other.