"

Fluttershy felt sorry for the damage she did with the BFG. She has been paying off the damage little by little, but she still needed to get away from her mess and try to calm down. So she decides to head for Manehattan, while there she finds another weapon like the BFG. Her corrupted state returns.

This is a borderlands crossover. The Norfleet is a powerful legendary (and E-tech) rocket launcher. If you wish to learn more about it, check out the borderlands wiki