Part 21 (15 Total)
Part 21 had 15 sculpts total. This part had the iconic Satan Cross sculpt (#292), Spinning Head Ashuraman (#305) and the Sunshine sculpt with the removable chest piece (#306).
Also many sculpts we wound up seeing in the Mattel Muscle releases are found here. By this point the collection had 306 figures total and this part is often difficult to complete because of the 3 sculpts mentioned )especially the Satan Cross because of the hind legs are often missing) but if you owned the Part Ten 28 Box set you could accumulate many of the Part 21 sculpts.
Some of the sculpts were later resculpted in 2008 so be aware when shopping online; the Satan Cross or Sunshine with removable chest piece for example; a good tell tale of course is the CHINA mark on the back and the sculpts are slightly smaller than the vintage KInkeshi from the 1980's.
I have a complete Part 21 set (two sculpts in Blue) along with the Daishi (my absolute favorite Daishi!) that came from a Gashapon machine I purchased.