Swords of Justice Subplot
The Swords of Justice get separated while they are in the midst of training their newest addition, Keldeo. Like all the legendaries, they’re bewildered by the sudden change. They end up finding their ways to regions’ forests. Although they wish to find their way home, they end up resuming their duties of protecting other pokemon from harm, delaying their mission.
Keldeo, however, is anxious to return back to Unova. He does not know where he is and where the others went, and was in the middle of learning Sacred Sword when Hoopa transported him elsewhere. Eventually, Keldeo runs into Rayquaza while in Sinnoh. Thinking that it can prove itself worthy of joining the Swords of Justice officially is by fighting (and winning) against Rayquaza. Unfortunately, Rayquaza doesn’t even want to bother.
At this time, the PC mods have created the legendary tracking software, and Bianca and the BW2 kids are trying to figure out which ones are still missing from the region. They realize it’s the Swords of Justice and the Forces of Nature, so the BW2 kids volunteer for the former, while Bianca calls on Touko to help with the latter.
Luckily for Keldeo, Hyuu ends up saving him the second time he tries to battle Rayquaza - in which Raquaza decides that it will fight back if only to stop him from bothering it anymore.
Mei finds Virizon in Kalos, and Kyouhei finds Terrakion in Kanto. Just as he is about to get to Cobalion, Hoopa takes it to Johto.
Once the trio reunites in Johto to find Cobalion, they find the leader did not land well and is stuck on a ledge. Together, they end up saving Cobalion and returning the Swords of Justice back home in Unova. They lead the trio to Pledge Grove, and they witness Keldeo learning Secret Sword, transform into his Resolute forme, and become a full-fledged member of the Swords of Justice.