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A surprising first for the series: The first episodic Pokemon remake!
Pokemon Adamant Diamond: Gyms 1, 2, 3, 4
Pokemon Lustrous Pearl: Gyms 5, 6, 7, 8
Pokemon Griseous Platinum: Victory Road, Elite 4, Postgame, and the new Let's Go! Riolu chapter that involves you training a Riolu from scratch and, using either Pokemon Go candies or IRL money, increasing its stats until it's strong enough to take on elite four and champion all by itself (in a series of computer-controlled battles).
Adamant Orb, Lustrous Orb, and Platinum Orb can all be bought as separate accessories for $50 each and unlock the box legends of their respective games.