For moves, Mist and Misty Terrain(grounded Pokemon affected only)
For items, there is the Guard Spec and White Herb
And if you want abilities, then there is Clear Body, Full Metal Body, White Smoke, Keen Eye(prevents Accuracy from being lowered) Hyper Cutter(prevents Attack from being lowered) and Big Pecks(prevents Defense from being lowered)
If I forget anything (which I probably did) then put what I forgot in the comments