Before there was XJ-9, there was XJ-8, and before that XJ-7, then XJ-6, XJ-5, XJ-4, XJ-3, XJ-2, and finally XJ-1. When Jenny finds and reactivates her sisters, she is beyond happy. But each sister has her own personality, and not all of them have the same level of friendliness that Jenny has. Still, sisters can be counted on, right and is there a secret XJ-10? The main villains of this episode are Evil Super Mario Brothers clones known as the Mad Hammer Brothers. They may be Wario and Weegee.