Acrein; once a realm full of peace and prosperity, cast into the devastating shadows of disease and war.

The world known to its inhabitants as Acrein is no longer the way it used to be. Dark forces are creeping in at every corner, plaguing and ravaging cities and villages. Pokemon are dying off at an alarming rate, whether it be because of sickness or grand slaughters. What makes it even worse is that the three nations of Acrein have strained relations with one another. Before, they used to willingly give supplies to one another, but now they keep to themselves and prepare for an "impending war" that spawned from nothing but paranoia.

Luckily, there are some Pokemon that stepped up to help those in need. These Pokemon have gathered together to form the Acreinite Expedition Force. These young expedition members have decided that they should search for the dark force cloaking the lands, sometimes at the cost of their own lives. Members of the Acreinite Expedition Force have also been known to chart undiscovered areas, rescue Pokemon in distress, and provide relief to towns hit by such a dark force. But be warned; being part of the Expedition Force isn't all fun and games. No, these Pokemon have their work put out for them.

Will you make it in these tough times?