Hi there, yet-another-Aya-victim. *slaps on the back* Welcome to the club.
Okay. I'd suggest you raise some Ground and Psychic types. Whatever you prefer. Your Espurr can learn Light Screen, which can make Aya's team behave a bit. Personally, I used Calm Mind Swoobat. She is awesome because she is part flying, which means she can be combined with your ground type in a double battle. Oh, and that person above who mentioned Swinub? I like that person. Calm Mind boosted Psychic/Earthquake. Bye, Aya. Do it now, before she gets boosted next episode.
Moving on: I'd keep Luxray, because you need something for Tentacruel. (IMO, Thunder Fang rather than Charge Beam because Tentacruel is weaker on the physical side.) And you might consider raising Houndour, to counter that Gengar of hers.
Good luck with the beast