[THIS STORY HAS BEEN REWRITTEN!!! Feel free to read this one, but it's not as good as my rewritten one!!!]
This story takes place directly after the Ultimate Show and towards the end of Era 2 of Steven Universe.
Super Dimentio is defeated, Blumiere and Timpani disappeared, the Chaos Heart is gone. Everything is good now, right? Wrong. Mario and Luigi go back to Castle Bleck to search for any signs of the villain Dimentio returning. Instead, Luigi finds only the gemstone Dimentio wore on his collar. Mario tells him not to do anything with it, but he doesn't listen and now Luigi has a problem on his hands.
(SPM belongs to Nintendo and Steven Universe belongs to Cartoon Network[?])
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[If you're not seeing this on Wattpad, then THIS is an unauthorized copy!!! >:C]