Giovannis ancestors?
Maxie r archies ancestors?
Pluto or Cyrus ancestors?
Maybenone of those could be the leader of an evil group
OH!
This could be durinfpg a time when maxi and arches ancestors were together, and as you progress throughout the story, your knights begin to break them up, and to stop them from attacking the region, you cause them to fight each other which lasts all the way until the hoenn games!