Okay, the Mushroom Kingdom is under attack by a myriad of Super-strong characters that resemble past bosses. Mario and Luigi realise that Bowser has been using his evo guns to evolve his troops and using them as a super-army.
Mario and Luigi must go out and defeat their new enemies, the super-strong characters. Nyah!
Well, that's the basic plotline to a fanfic I was working on a while ago anyway. It was pretty good, but I never finish them.
Fryguy - summoned from the flame
Ralph Wiggum "I bent my wookie!"
Wolverine "This is... a big round room!"