A colt with with no memory wakes up in the Everfree Forest only to find that his once human body is now the body of a pony's! After meeting another pony and forming a rescue team with her, their investigations lead them to discover a dark secret that could threaten to destroy Equestria. Could the increase of monsters and disappearance of the Elements of Harmony be tied to the amnesiac colt?

In the aftermath of a huge explosion in the Everfree Forest, Ponyville soon finds itself as the new home for Lucario, an "Aura Pokemon" from another dimension. While he avoids explaining what has happened to him and where he came from, he repays his new friends' kindness by protecting them from the evil forces that suddenly appears around Equestria.

Meanwhile, a certain princess of the night watches his every move, unable to judge if this new visitor will bring safety or utter destruction upon the land.

(This story primarily takes place between season 2 and season 3. Elements from season 3 and beyond may occur, but won't have a significant impact on the plot.)