Pot's Diary is an obtainable item which you have to get laid to get
Apearance[]
Pot Diary has the same design as DIO's Diary, but the book cover is white instead of brown. Thus does not have a DIO text at the middle of the cover, the extra design it does not change. Also has Yellow lines like DIO's Diary.
For what it's used for?[]
It can be used to evolve Star Platinum Over Heaven and Green Platinum