When a group of arms-dealing mercenaries packing outlawed tech moves into Neo-Gotham, Batman Beyond, or Terry McGinnis, moves to put them out of business.

He didn't expect to be brought to a parallel world known as Equestria through a mishap with an experimental translocator. And it seems that wherever Terry McGinnis goes, trouble soon follows him.
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Twilight Sparkle, newly crowned Princess of Equestria, expected it to be an average day in Ponyville. She didn't expect her and the Elements to be kidnapped by Diamond Dogs. However, they are rescued by a mysterious figure, a human, who calls himself a name Twilight and Equestria will remember forever.

...Batman Beyond.
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Batman Beyond Crossover, will have swearing and slight gore.