>>29233357You're forced to use all new Pokemon. It's very easy to fall back to "old and reliable" trope, for example going for the tried and true early Magikarp-Gyarados combo.
Yes there are many copies, like Golem line copy and Machamp line copies, but that's better than just lazily stick a Geodude or Zubat in a fucking cave yet again. With Swoobat and Boldore at least I'm kinda interested in what they could've become.
Also atmosphere, especially during the Fall/Winter season. Most people blaze through Pokemon Black during the Fall season (release month). It was super comfy.
Finally, decent story, decent endgame (especially BW2), protagonists that doesn't look like kodomo-nee.