>>32542337Because smartphone kiddies and nostalgiafags are who Gamefreak is pandering to now.
Kids lack the attention span to do anything beyond the main campaign so they left it out. People that like extra content and a decent challenge in the post-game aren't the target audience anymore, sadly.
I honestly dread how they're going to butcher Sinnoh. Platinum is my favorite main series game and I just know that they're going to remake Diamond and Pearl instead.