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Snips literally 6-0s her
She's not programmed to withdraw Spiritomb on that matchup so you can literally setup Acupressure until you've got your Snips (Final Form) and then he sweeps even if +6 Knock Off/Crunch didn't OHKO Lucario or Togekiss and if they somehow hit you despite the evasion you're at +6 in bulk so you don't care.
Funny too because Snips is very easy to make ingame especially in BDSP. Skorupi is easy to obtain, it learns Acupressure naturally, Dark STAB is easy, Rest is purchaseable in the big store, and given how much of a setup fodder Spiritomb is, you could forego Sleep Talk if you burned the Eterna Forest TM on someone, but it's purchaseable from the Underground in the remake anyway.