>>23274153>>23276693>DPPainfully slow gameplay (even the framerate), the most melodramatic grimdark and worst paced plot in the series, pinnacle of unnecessary HMs, introduced Stealth Rock, absurdly low variety in some areas (hope you like Ponyta), started the awful Contest knockoffs, introduced just 78 completely new Pokémon (including 15 Legendaries)
>BWNo old Pokémon until postgame, most plot-centric game by far, weak Starters, turned mainstream battling into Weather Wars, no Safari Zone, Pokémon have ridiculously high evolution requirements, the C-Gear takes up the bottom screen despite having no use in single-player, postgame is challenging only due to level scaling and has minimal real content.
>XYThe easiest games in the series by far with the player being given massive gameplay advantages the AI has no access to, a new EXP system and overpowered EXP Share that not just encourages but guarantees overleveling, the number of trainers with more than 3 Pokémon can be counted on your hands, only two real battles in the main game use Mega Evolution against the player, four flat and generally uninteresting "rivals", significantly limited customization options for male players vs female players, Starters are once again outclassed by other options (even the Kanto starters), the fewest new Pokémon of any Gen, you need to pay to transfer forward old Pokémon for the first time since Gen II, no Safari Zone, and possibly the most shallow post-game since Gen I.