This is Part I of The Epic "What If" Kingdom Hearts Rogue Data Replicas Boss Fight Final Round.
The mighty Keyblade Master takes on the big baddies themselves, Xemnas/The Superior of Organization XIII or the 13th Order as they are also known as and Marluxia/The Graceful Assassin and the Main villain of Re:COM.
As you could see, Sora is using Wisdom Form to battle the RDR Baddies and the Illuminator Heartless is used in the background to make this fight look even more scarier.