Ferroseed, Ferrothorn, Oranguru: Can't learn Attract, makes sense they're spiky and nobody wants to get close. Oranguru is a hermit guru, it's celibate so OK it can't
Tynamo, Wynaut, Wobbuffet, Spewpa, Kricketot: Can't learn Attract, makes sense because they're supposed to be move limited
Nincada: Can't learn Attract. One possible evolution is genderless Shedinja, makes sense they can't learn Attract so Shedinja doesn't
Larvesta, Volcarona: An atlas moth, can't learn Attract, wait why?
Mew: No gender, space fetus. Can learn Attract, OK it can learn every move so keep up the gimmick
Cryogonal, Dhelmise and Minior: No gender, inanimate object/meteor, Can learn Attract, does nothing because they have no gender. Why?!