The base is made of form styrene (PS material), and obviously, it's suitable to be used by other figures such as S.H. Figuarts Kamen Rider W Cyclone Joker and Tamashii Web Shop limited S.H. Figuarts N Daguba Zeba as shown in the last 2 images above.
Super Robot Chogokin Mazinger Z will be out today (August 4th) at 3,675 Yen (inclusive of tax).
Images are from Super Robot Chogokin Diary.