Complex sentence: This is the Final Boss of the manditory story mode, at first she is basicially just an evil looking version of peach and when you get her health down to half she turns into a giant black ghost wrapped around peach.
Split into simpler sentences: This is the Final Boss of the manditory story mode. At first she appears as an evil looking version of Peach, but when you get her health down to half she turns into a giant black ghost wrapped around Peach.