Pretty self-explanatory. Being able to switch between the old and new monster designs would just be a subtle neat feature for a nostalgia trip. Not that I'm griping about the new designs (Greenasaur and Rockilla, I preferably like their new designs better.), but me being an old school player from early 2014, I dearly miss old Pandaken, though the new design isn't too shoddy. I like it, but nothing beats old Pandaken's design in my opinion.