This image basically confirms that in Ultra Sun/Ultra Moon we will be seeing an alternate story. While it has been stated by Nintendo multiple times that this was the case, they were never really clear on it.
Alex S. from Link Cable Gaming writes: " Pokémon’s release kicked off a worldwide phenomenon that is still going strong to this day. In fact, some will say it’s never been a better time to try to ‘catch ’em all’. But is it? That’s the question we’re aiming to answer in this inaugural article of Pokémon week here at Link Cable Gaming – which generation of Pocket Monsters is truly the master of them all?"
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Daily Video Game writes: "If you are looking to pick up new games to play on your Nintendo Switch and 3DS right now, the online retailer Amazon is featuring a wide range of games on sale with up to 67% off for both of these gaming platforms."