>>56329333I've seen a couple where the NPCs will have full on competitive sets while the player has zero opportunity to do anything to close that gap. Bonus points if you randomly switch between doubles and singles in addition to lifting teamsheets from smogon/VGC players.
Level caps in + Enemies above that level cap. I've seen game cap the player at 65 then randomly throw things level 70-80 at the player.
Whittle down fights are pretty fucking aids and you can make it a million times worse by being stingy with PP recovery options. I've seen plenty of pokemon with the ability pressure and a fucking focus sash seemingly just to make me burn 4 PP.
Sets that are impossible for the player recreate. Because it's really fun when your 252/31speed boosting nature not only gets outsped but out damaged in in a mirror match somehow.