User blog comment:Uselessguy/Guess Levels in the whole series/@comment-25154254-20150223092420/@comment-24828059-20150223094712

The SOS parties:

Those refer to Imitater, of course.
 * Sunflower, Lightning Reed, Iceberg, Imitater Iceberg
 * Sun-shroom, Magnifying Grass, Sun Bean, Imitater Sun Bean