(I canceled the au, but I'm just gonna post this here for the fun of it)
(ATTENTION: THIS IS MEDIOCRE WRITING. DON'T EXPECT THE BEST WRITING, I'M ONLY DOING THIS FOR FUN, AND DON'T BE SURPRISED IF YOU DON'T ENJOY THIS STORY.)
Back in BFDI, the old golden days, when Firey won Dream Island, everything was ordinary, and what Leafy might say, perfect. He invited all of the other contestants into the island, including Coiny, his arch-enemy, and everybody went in, everybody but Leafy, since she wasn't allowed into the fancy isle. Little did they all know, Dream Island was a trick, and all of them who came to the malicious land ended up zapped, getting washed with amnesia, and earning total emotion loss. Leafy was unaffected by it. Years later, Leafy finds a cure to this emotion loss, and it's in her favorite soda, called Metoif. But once she takes action and gives her blank mind companions and foes a small stab of their emotions back, things go insanely wrong.