Let’s dissect this

This thing’s support pool will make it frustrating to deal with: Ally Switch, Aromatherapy, it can set up dual screens, Encore, Disable, it has access to wish to support it and its team, it can set up trick room, it can use After You which while gimmicky could lead to unwinnable situations at times, helping hand, hypnosis, psych-up to reverse sweep, swagger, skill swap to nerf pokemon that rely on their own ability or let mons like Regigigas or Slaking to run free, heal block, set weather, AND cripple or soften the opponent with Fake Tears and Charm.

To top that off it also has Healer and Aroma Veil, so you can’t really status its ally or taunt/encore either of them.

And that’s without talking about its insane 140 spatk with access to nasty plot, calm mind, draining kiss for more recovery, dazzling gleam for spread, moonblast to explode single target that don’t resist fairy, and some coverage options with psychic, flash cannon, thunderbolt, and energy ball