>>45503693People focus too much on the technical aspect. Of course a rehashed GB game is gonna have more features than a 3D game on new hardware
The real issue is Pokemon is stagnant, it's largely the same as it was in 1996. With very little differences in execution, every other game is gonna seem massively inferior to whatever game you think is peak Pokemon (Plat/BW2 right now, but I'm old enough to remember when it was GSC)
Take mainline Mario as a comparison. Even though I think Sunshine is inferior to 64, it still ends up pretty fun to play because FLUDD does more to freshen things up than any other Pokemon game has tried to do