Without the Everstone, will Ash's Rowlet evolve into Dartrix and Decidueye given the training and battles it got since finding its Everstone (since Hau's Dartrix rematch)?
You can disregard the writers all you want, but they're the only ones who make that call and the only thing that actually matters in answering this. Number of battles etc has no influence regardless of how persistent some people continue to believe that. The writers decided Rowlet wouldn't evolve and the Everstone is nothing but a plot device to achieve that. Had there been no Everstone they'd have come up with another reason or just not evolved it and never addressed it, just like they never evolved Corphish or Buizel or Totodile.I think I have to change the question: If Rowlet never had the Everstone (and still learn Bullet Seed), will he be a Dartrix/Decidueye now (disregarding "writers will blah blah")?
Prior to the Everstone, I was hoping Rowlet would evolve into Dartrix (don’t really care for Decidueye).
I don’t want him to evolve Rowlet is very popular and has lots of merchandise that I don’t think would sell well if he was a decidueye or dartrix