Hi again! I recently rated one of your Ice monotype teams, and I'm excited to be rating another one of your teams.
Again, I will be following the same format, so you can take as many changes as you'd like.
Sharpedo: This set is fine.
Muk-Alola: In my honest opinion, this set is a little outdated, even by the time period's standards. By the end of the USUM era, almost all of the Muk-Alola that I knew ran Curse + Iapapa Berry. This was to help with the Fairy match-up, as Curse Muk-Alola can almost use any Fairy Pokemon as set-up fodder.
Muk-Alola @ Iapapa Berry
EVs: 248 HP / 12 Def / 248 SpD
- Knock Off
- Poison Jab
Mandibuzz: This set is fine.
Houndoom: The inclusion of this is a bit awkward because it doesn't contribute much to Dark's match ups that Alola-Muk doesn't already. But this moveset is fine.
Umbreon: This set is fine, but you should also be running Foul Play instead of Dark Pulse on this because Umbreon has pitiful attacking stats.
Liepard: The inclusion of this Pokemon is dubious at best, but if you must have it, consider Nasty Plot instead of Charm. That allows it to have more offense presence. You could also try Sunny Day instead of Charm to help out Houndoom.
Overall Team Composition Analysis
I see that you are trying to go for a more offense-oriented Dark team. However, I would simply stick to one and commit to it. For instance, the inclusion of Umbreon is confusing because it saps your momentum by being very passive. I will make some recommendations to help make your team have a stronger focus in one area.
Team Composition Changes
Umbreon --> Krookodile (you need Stealth Rocks on this team)
Houndoom --> Specs Houndoom or Scarf Greninja
Liepard --> Hydreigon (this is good for speed control, outside of Sharpedo's Speed Boost)
Krookodile @ Focus Sash
EVs: 252 Atk / 4 SpD / 252 Spe
- Knock Off
- Stealth Rock
Greninja @ Choice Scarf
EVs: 4 Atk / 252 SpA / 252 Spe
- Ice Beam
- Gunk Shot
- Dark Pulse
Hydreigon @ Choice Scarf / Choice Specs (if you choose to run Choice Scarf Greninja)
EVs: 252 SpA / 4 SpD / 252 Spe
- Draco Meteor
- Dark Pulse
- Fire Blast
That's it! If you would like to keep your Pokemon, please consider the movesets that I recommended. If you would like to change up your team, the team composition is a great place to start. Let me know if you have any comments or questions.