Celebration Pot is one of the rarest unobtainable stands in A Bizarre Journey. It is S tier unobtainable
Only 3~ or maybe more people got it. (The persons I know are Games0ooo and CodeI0I)
How to get it:
Use Celebration Diary on Old King Crimson (not confirmed)
There is a showcase of it -> https://www.youtube.com/watch?v=GvCpqxSYwbc&ab_channel=3gc4
(Loud warning)