Some things that stand out to me:
Dialga with Rest and Shed Skin is pretty fearsome. It's very possible to set up a bulky sweep with just a few Bulk Ups.
Florges with Thick Fat increases its general bulk. Nice to see Florges with an actual ability for once.
Gigalith is very good as either bulkier with Intimidate or an offensive anti-sticky web tank with Defiant.
Gliscor gets dealt a very good hand with Magic Guard, Thick Fat, and Regenerator. All topical.
Rayquaza gets Sturdy, so it can run a psuedo-Dragonite set with Dragon Dance and Weakness Policy. It'll take a lot more damage, but it also gets Extreme speed to beat any priority killer, especially Sucker Punchers.
Wobbuffet gets Hustle and Competitive. That's good stuff, man.