I'm looking forward to Hoopa, but not as a sweeper, tbh. If anything, I was thinking a lure set of Sub + 3 Attacks...
Hoopa-Confined
Leftovers
Timid Nature (needed to outpace Adamant Sharp and Jolly TTar)
EVs: 252 SAtk 4 SDef 252 Spe
Substitute
Shadow Ball
Psyshock/Hyperspace Hole (HH helps against Wish + Protect users, FWIW, along with hitting Chesnaught harder)
Focus Blast
I was thinking "what gives the little guy problems?" and realized the Pursuit + Sucker Punch Trap was a big one along with Scarfed Pursuit. But what beats that? Sub + Focus Blast! Basically on any predicted switch you Sub, and then proceed to FB any dark type (or raw switch and let them Pursuit the Sub, if you are really paranoid about Focus Miss). It's nice for having a way of removing TTar or Bisharp and in general just hitting offense. You also can't be Hyper Voiced that easily because of Hoopa's decent base 130 SDef, so M-Gard won't stomp you through. It's not amazing against defensive teams, but you are immune to SToss and can (with Hyperspace Hole) handle Wish + Protect more easily. With the ghost typing you could run hazard stacking--mainly TSpikes to help with walls--since you beat all of OU's spinners (albeit no defoggers...) and being a Psychic Type you handle Poison-Types well (needless to say).
EDIT: I know this is gimmicky, but could Colbur Berry + Magician be a thing for offensive sets? (I can hear the facepalms already...)