>>56703713>There's no evidence that Pokemon Z was ever going to be a thingLet's look at the anime, shall we?
Starting with Advanced, we have Advanced, Advanced Challenge, Advanced Battle, Battle Frontier. This last one sounds like it's referencing Emerald, right?
We can skip Diamond and Pearl because nothing of interest shows up.
Then we have Black & White, Black & White Rival Destinies, and Black & White: Adventures in Unova and Beyond. That last one sounds like a sequel name, don't it?
Then we have Sun & Moon, Sun & Moon: Ultra Adventures, and Sun & Moon: Ultra Legends. Those last two reference the ultra games, there's absolutely zero doubt.
Now, you may have noticed, I skipped XY. Let's take a look, shall we? XY, XY: Kalos Quest, and XYZ. Hey, wait a minute, Z? What is this? (Almost) all the other anime series have a reference to a third version in their last season, so why is XY different? Why does XY have a subtle but noticeable naming scheme change at the end like the others? Could it be that XYZ was supposed to reference a Z version that never made it past preproduction?