>>25328862>Sky battles10 battles that you can only do once, fucking awesome.
>tons of overworld things like Roller Skates/PSS/riding Pokemon>you couldn't even sit on a fucking bench before XY.Not mechanics. If you're gonna pick tiny insignificant shit like that, gen 3 introduced contests, running shoes, fishing while surfing, a cave that is different at different times of the day, dozens more.
>Amie/bonusesOK there is a new mechanic here.
>Super TrainingNot a mechanic, just a feature
>mid-turn forme changes??? I already mentioned megas. There are Pokemon from gen 5 that can change form mid turn (Meloetta, Darmanitan).
>first time base stats have been touched in foreverIrrelevant.
>rehauling the type chart for the first time since Gen 2Part of the Fairy stuff (it's all type chart updating).
CONCLUSION: your pattern is utter bullshit. There are new Pokemon and new mechanics introduced in ever gen, GF don't decide what to put in based on the modulo of the gen number.