The riddler posted a new image. (the aristotle one is still there since the Pokemon hasn't been revealed yet)
N1 depicts Yukie Nakame, a Japanese actress and a character from the anime "Darker Than Black" called Kirsti. Apparently these don't hint to the new Pokemon directly. (not sure what that means...maybe it means we have to look deeper into these characters backgrounds to figure it out)
In case you haven't seen Darker Than Black, Kirsti is a doll...I can't remember exactly what her deal is (it's been a while since I watched it) but I think dolls are like people except they've supposedly lost all of their own identity...so they get sold to people. None of that might end up being relevant though.
N2 is a monk's staff and N3 is a picture of Wu Yong. Apparentely he's an advisor for a gane of 108 heroes in a fiction.
Edit: Also the riddler gave a new hint for the aristotle one: four element-->5th element-->celestial body-->hole-->hyperspace