[details=Spoiler] So, Enrico Pucci (big bad guy)'s stand levels up not once, but twice during the final fight. His improved form (C-Moon) reverses gravity from a 3 mile radius around him, and when his stand contacts something, it turns it inside out. After that form was beaten by Jolyne making mobius strips in her body with her stand power (fucking crazy, but it makes sense) + Jotaro assist, Enricoās stand evolved to its final, super busted form, called Stairway to Heaven. From the JJBA Wiki:
Time Acceleration: Claimed by Dio Brando to be the ultimate stand, Stairway to Heaven has the ability to control the gravitational forces of the earth, moon and possibly the entire universe. As gravity changes, Stairway to Heaven is able to speed up the flow of time while preventing any living being from catching up, with the exception of its user, Enrico Pucci, and essentially God. It should be noted that while time speeds up for all nonliving processes, the biological clocks of the people themselves do not and still remain the same as if time has not accelerated.
Universal Reset: As time continues to travel, the universe will hit the vanishing point, and a new universe will be created where everything repeats itself accordingly to "fate". The stand's user may then alter the characteristics of the universe and the fates of the people in the recreated universe and create the perfect world they desire. Anyone that is killed by this stand in the previous universe will not cease to exist, but simply replaced by a similar substitute, though Pucci states that their souls and personalities will have been erased and that they will appear as completely different people. The fates of the people cannot change unless Pucci himself performs some action that changes them, though Pucci cannot control how his actions change the fates of others.
Long story short, Enrico manages to solidly trounce everyone working together, since Stairway to Heaven was way better than Star Platinum. Jolyne sacrificed herself to save the kid Emporio, and Enricoās stand accelerated time to the point that the universe rebooted to the beginning of Stone Ocean. At that point, only Emporio knew that Enrico had his badass stand, so Enrico went to kill him. During the chase, Enrico knocks Emporio into the disc containing Weather Reportās stand ability (the disc bit was part of Enricoās first stand ability, and Weather Report was a dude that could control all aspects of weather), who, despite being unable to control the stand, enables it to make use of its hidden ability to increase the concentration of oxygen in the room, poisoning Pucci with the oxygen overdose and incapacitating him. Pucci begs for his life, saying that his ideal world for humanityās happiness would be ruined, but is finally killed by a barrage of punches from Weather Report. His universe then resets into an alternate timeline, in which Jolyne and company meet up coincidentally and the Joestar bloodline survives.