>>47444306Up until BW2, both the games and the anime only used Gen 5. Sugimori even said that he created Audino for exactly that reason; to replace Chansey because he expected the anime to use nothing but new Pokemon (with the exception of Pikachu and Meowth).
But then they want back on that and now suddenly pre-Gen 5 Pokemon are in Unova despite them making a big deal about Team Rocket needing to leave Wobbuffet and their other Pokemon behind because using non-Unova native Pokemon would make look suspicious. Now Iris has to have a Dragonite thrown onto her team because she's the Champion in the new games. Now Dawn and Cynthia are back for no reason. Now Ash has to fight Roxie instead of Drayden for his eighth badge when the badge case previously had a slot for Drayden's badge.
You can tell BW2 caused a massive shift in the anime (it was also the reason for the original Team Plasma episodes being unaired and getting retconned out of existence)