Quiet as it’s kept, a lot of people try to blame “the lines of Gym Leader, Elite Four and Champion being blurred in JN” but it was really XY that started that.
I stand by the notion that the battle with Diantha should’ve happened somewhere after his eight gym badge or Gardevior shouldn’t have fallen or had a hard time deflecting its move as much as it did during that time.
Losing to Wulfric (which was unnecessary because he already got his mandatory rematch with Viola) after getting as far as he did with Diantha is jarring. You could argue that Greninja and Ash weren’t in sync but Ash was also fighting Mega Gardevior with an unfinished form. Anyways I’ve discussed this plenty but if the argument were to ever be made, JN didn’t start that “trend”. Every other series was consistent for the most part.
Ash won a close match with Volkner (Gym Leader), struggled a lot with Flint and Bertha (Elite Four) and Cynthia one shotted all of Paul’s Pokémon (Champion). In XY Greninja overpowers Mega Gardevior’s Shadow ball, smashes it into a tree (Champion), loses to a Wulfric (Gym Leader) and then proceeds to never defeat his rival who defeated an Elite Four member.
Agreed, I think JN more or less confirmed what has always been an established fact in the universe.
On top of what you said, Gym Leaders always battle at a certain level/range based on the quality of opponent. Frontier Brains were said to be on par with the Elite Four back in AG. Tobias destroyed all of Sinnoh with 1 Pokemon.
JN more or less confirmed that having a certain title might make it more likely for you to be higher/lower than somebody else, but not a guarantee.
And in a way, I like that it confirmed that. It seems more realistic.
I remember the Internet powerscaling arguments when XY aired, and how Greninja became de facto #1 based off those battles, despite Ash’s previous Pokemon also having strong performances. Then SM and JN aired and showed that Mega Evolution/Bond Phenomenon was not the only gimmick, and in fact having gimmicks does not guarantee victory.
Perhaps JN went too wacko and random with its powerscaling (or utter lack of one), but hey, at least that meant Ash finally achieved his goal to be #1 and we can now get to watch Liko and Roy…