But Huy uses one and it doesn't even have minimize or siesmic toss or Toxic.

Blissey (F) @ Chople Berry
Trait: Serene Grace
EVs: 40 HP / 252 Def / 148 SAtk / 68 SDef
Modest Nature (+SAtk, -Atk)
- Mud Bomb
- Skill Swap
- Icy Wind
- Softboiled
This is by far the biggest change to my team. Blissey filled a good number of holes left by the rest of my team and offered me a brand new toy play with. Speed control and Skill Swap were my main reasons to use Blissey. So why not Cresselia? While Cresselia is probably the best Pokémon for Speed control and Skill Swap, it was not the best for my team. Blissey wouldn’t have to worry about Chandelure Shadow Balls, and it gave me something to switch into Dragon Gem Draco Meteors which I did not really have before. While I could use Cresselia to take the Draco Meteor, Blissey gives me the option to recover all of that damage off with Softboiled. Blissey also offers me a lot of fun things to do with Skill Swap that Cresselia wouldn’t let me do. My team doesn’t really benefit from Levitate, but with 3 Blizzard abusers, they’d all love to take a stab at firing off a Serene Grace Blizzard. An added benefit is that two of my Blizzard users have abilities that can be reactivated. Being able to reset Intimidate and Snow Warning and give my partner Serene Grace would really put a kink in my opponent’s plans.
Now all of that may be self-explanatory but I know what you’re looking at so let’s address the elephant in the room: Mud Bomb. Mud Bomb is a 65 base power, 85% accurate Special Ground-type attack with a 30% chance to lower Accuracy. Now how does that fit into my plan? With 148 Special Attack EVs, Mud Bomb will 2HKO Wolfey’s Heatran while taking negligible damage from whatever Heatran decides to throw back at it. With Serene Grace, the chance of an accuracy drop bumps up to 60% giving me another out with an opponent’s miss. The rest of the EV’s were just dumped in for general bulk. Blissey needed max defense and a Chople Berry in order to survive Fighting Gem Close Combats from Hitmontop so I just ran with that and dumped the rest into HP and Special Defense.