EoS Black Star Vs EoS Jotaro Kujo
Scenario 1: In character
Scenario 2: bloodlusted
- No holding back
- Both serious
- No prep
- No morality
- Win by death
Location: Death City
@DBZ_universe: Star Platinum is the name of Jotaro Kujo's Stand. A Stand is basically a spirit (only able to be seen by other Stand users but some Stands, depending on ability of said Stand, ignore this. Star Platinum is not one of those however) that is used for combat or other purposes but mostly combat. Meaning Jotaro himself isn't really fighting himself, although he does throw punches himself at times. A Stand is also intangible. Think of Obito's Kamui. He can become intangible but materialize when attacking. Star Platinum does this. However, the reason Black Star can't win is because Star Platinum is FTL and can shatter diamond with one punch. A Stand can only be affected by other Stands unless the Stand materializes in order to defend the Stand user, which in this case is Jotaro. If the Stand dies, the user dies as well (Dio survived his Stand's destruction though, but only through sheer determination and impressive regeneration). However, this goes the other way around. If the Stand user dies, the Stand dies as well. The Stand Notorious B.I.G. survived his Stand user's, Carne, death but that is because it's an extremely haxxed Stand.
Now if you were talking about Jotaro alone without Star Platinum, he is only Peak Human so Black Star would tear him a new one. But, as it stands (no pun intended), Jotaro is allowed his Stand in this one. And it'll only take a few punches for him to kill Black Star.
@GeneralVan: Did he shatter actual diamond with his punch or something as hard? Very big difference, diamond is a crystal and as such can be shattered very easily via blunt force, if it was something as hard as diamond but wasn't crystal, such as carbon nano tubes, it would be as you said.