The
stand of Jotaro Kujo in JoJo's Bizarre Adventure Part 4, "Diamond is Unbreakable".
Star Platinum:The World is an
evolution of the
stand that Jotaro had in Part 3, "Stardust Crusaders", which was just called "Star Platinum".
*SPOILERS FOR BOTH PART 3 AND PART 4 AHEAD*
The reason why the
stand is called Star Platinum:The World is because of the ability it has.
In part 3, the Stardust Crusaders and Jotaro battle a
vampire named
DIO, who also had a stand. His stand was called "The World", and its main ability was to stop time.
DIO used The World's ability against Jotaro a lot at the end of Part 3, and each time he stopped time he said "ZA WARUDO! TOKI WO TOMARE!" ,which translates to "The World! Stop Time!" or something like that.
At the end of the part, Jotaro used Star Platinum against
DIO's Road Roller attack, and he managed to escape it by stopping time.
Since Jotaro used The World's ability to kill
DIO, Star Platinum evolved into Star Platinum:The World, having not only a new name, but also a new ability (which Jotaro would use a lot in Part 4)
At the end of Part 4, when Jotaro, Koichi, Josuke and Okuyasu battled against Kira, Jotaro managed to stop time and kill Kira when Koichi used his "Three Freeze" ability. (This is where the "Koichi is very reliable"
meme comes from).
Star Platinum:The World is also present in Part 6:Stone Ocean, but, for some reason, It is now called "Star Platinum:Stone Ocean",
even though it has the same abilities as in Part 3.
*Kira tries to push the
switch for Bites The
Dust*
Kira: YOU ROTTEN PIECES OF SHIT!
Jotaro: STAR PLATINUM:THE WORLD!
*time freezes*
*Jotaro says a little speech then beats up Kira, paralyzing him*
Kira: im-i-im gonna p-push th-the swit-switch
B-bites the
dust will g-go in e-effect
*an ambulance runs over Kira, killing him*
