>>37099724Franchise is already bloated with over 800 monsters and new ones introduced with each gen have harder time actually coming into the spotlight. Under 700 would be a sweet spot pretty easy to achieve through removal of bulk of legendaries, some birds and rodents repeated with each new dex and filler mons, most notably from gens 2, 4 and 6.
Removing megas is common sense, no need to justify that.