when are stands introduced in jjba

Stands are first introduced in Part 3 of JoJo’s Bizarre Adventure , titled Stardust Crusaders.

They don’t appear in Parts 1 or 2, which focus on Hamon instead. In Stardust Crusaders , Stands are presented starting with Jotaro Kujo’s ability, and from that point on they become the core power system for all later parts of the series.