>>30551323Gamefreak experimented with May's design in 2002/2003 as well as Flannery, and once they saw how many teenagers at the time craved lewd Pokegirl designs they continued in that direction.
If you notice most of the Gen 1 designs for the females was rather safe. Sabrina's old Gen 1 outfit, Erika, granted Misty was in a bikini. Then in Gen 2 you had Jasmine, Claire, Whtiney...and Marina, but nothing too blatant.
Then Gen III gave us May and Flannery and then they just started making the Poke girl designs more and more suggestive from there.