Alright so I managed to get to about 170% skin before a boss called Her appeared she had around 50 health, used the bleeding debuff , and look like what I think was a ton of Mary sprites overlaid and glitched together, after beating Her it sent me back to the main menu and unlocked the final dream diary, which is Noire's, now I've never collected the dream diaries before so if this is something new please tell me and ill post it in another comment.