Not sure if posted already but:
ポケットモンスター ベストウイッシュ シーズン2 エピソードN：あにてれ：テレビ東京
「Nの秘密…霧の彼方に！」 "N's Secret To The Other Side of the Mist"
Satoshi wondered into a strange place wrapped in fog. When the fog cleared, two girls named Helena and Verbena appeared before him. These two people were weary of humans, thus they and N made this place their hideout where they heal Pokemon that have been hurt by humans. Satoshi knows N's upbringing further.
*NOTE: I referred to Helena and Verbena as girls. The translation says "women" but I put girls because personally, it makes no difference.
SECOND SUMMARY: Satoshi and his friends met Verbena and Helena and now know about N's childhood. Furthermore, the relationship between Geechisu and Plasma-dan is also reviled as Plasma-dan starts to attack them.