So I was considering pasho berry diancie on trick room, hear me out before you call me crazy.
With the ban of mega mawile, I can't come up with anything other than mega scizor as a bulky attacker, I usually use him with knock off though, since I truly like that move, and it's rarely useless.
However, with scizor in Keldeo became quite an huge problem, hydro pump destroys everything, scald even has a chance to 2hko diancie, so I thought, what about pasho berry diancie to act as a lure?
This way you can then explode and bring keldeo to aqua jet/bullet punch ohko range, making him useless for the rest of the match, not only that, with pasho berry you can also setup against azumarill, assault vest azu now cannot 2hko you with a combination of waterfall and aqua jet, while belly drum azumarill cannot ohko you with +6 aqua jet, this way you can also explode against him ( 252+ Atk Diancie Explosion vs. 16 HP / 0 Def Azumarill: 300-353 (86.9 - 102.3%)
As you see, now crawdaunt/scizor can pick up the slack and finish off azumarill too!