You know what's really good right now?
CM Cress.
Cresselia (F) @ Chesto Berry | Safety Goggles | Leftovers
Ability: Levitate
EVs: 252 HP / 236 Def / 20 Spe | 252 HP / 252 Def / 4 SpA
Bold Nature | Relaxed Nature
IVs: 0 Atk | 0 Atk / 0 Spe
- Calm Mind
- Psyshock | Psychic
- Ice Beam | Icy Wind | Moonblast | support move
- Rest | Trick Room | Moonlight
We used to all knock this set, but recently it's been gaining popularity, even seeing a few uses in SPL. Basically, if you don't have a Bisharp, an Escavalier, or a really aggressive Hydreigon/Darkrai/Aegislash, you have a very good chance of losing to this. CM Cress is a defensive behemoth, taking almost insignificant damage from some of the strongest attacks in the game after a boost or two.
252+ SpA Mega Charizard Y Overheat vs. +1 252 HP / 4 SpD Cresselia in Sun: 217-256 (48.8 - 57.6%) -- +1 Psyshock is a 3HKO on 0/0 Zard
252+ SpA Life Orb Hydreigon Dark Pulse vs. +1 252 HP / 4 SpD Cresselia: 195-229 (43.9 - 51.5%) -- Leftovers with Ice Beam 2HKOs at +1, Hydreigon can't 2HKO back
252+ SpA Aegislash-Blade Shadow Ball vs. +1 252 HP / 4 SpD Cresselia: 170-204 (38.2 - 45.9%) -- unfortunately you still lose to this unless you run Shadow Ball
252+ SpA Choice Specs Politoed Hydro Pump vs. +1 252 HP / 4 SpD Cresselia in Rain: 184-217 (41.4 - 48.8%) - with Leftovers you can just boost past this
252+ Atk Parental Bond Mega Kangaskhan Double-Edge vs. 252 HP / 252+ Def Cresselia: 199-235 (44.8 - 52.9%)
And that's just the huge hits. Cress soaks up smaller hits just as well as it always does, and can even pull off the same kind of support typically seen from a Cresselia. The slots beyond Calm Mind and a single attack can be basically anything. You can even run fucking Toxic if you don't want other CM Cress around. It's absurdly bulky, it sets up on pretty much any special attacker or support Pokemon, and it will absolutely win a ton of games. Pair with a strong Fighting-type for best results.