Thanks for the thorough analysis. And the variation with Dewgong over Gastly sounds really promising, versatile and possibly hax-eliminating as well. I think Dewgong adds both versatility and variance to most teams (less likely to draw, possibilities to beat more Pokemon, but also creating actual losing scenarios)I'm a bit busy this weekend, so I only had time to test the teams of wtset and Actaeon.
While I liked wtset's team, it felt extrememly prone to being haxxed. Gastly has a variety of counters, including Paralysis and Sleep inducers who don't attack until after they've statused Gastly, or worse, status users who are faster than Gastly. Then, the status gets me I can't D-Bond or attack or anything. I think Haunter would've been better here since its defenses are so low that I doubt anything would have made a difference in it being able to die, but the 15-point speed increase could have really helped. Similarly, Huntail faces a haxxing problem, where even in the rain it couldn't OHKO many opponents (it took 2 hits to KO an Ursaring once), and without anything to counter hax, Huntail many times found itself unable to do anything to the opponent and lost adjudications to the opponent on Skill and Body, even with a Light Screen up. In other words, this has a similar anchor problem that I faced, except this time the problem is hax, which I alleviated on my Pikachu through Substitute but for me defenses were a problem. However, even then, I think this team performed the best out of all the other teams submitted, so this gets my 3 points.
Actaeon's team, as he said himself, is somewhat of a one-trick-Ponyta. If you can get behind a Sub and Belly Drum, there's very little that can stop you. If you can't… tough luck, you're probably gone. The usage of Thief on Dunsparce is very clever, as it removes threatening Chesto and Lum Berries, allowing Poliwhirl to safely come in on Yawns. Your Yawn + Sub strategy is pretty much the same idea I had, but is somewhat safer with Pikachu I think since Pikachu doesn't need an additional turn of boosting after Sub to hit hard. But you got to 62, which shows that this team, with luck, can get very far, at the cost of consistency. What perplexes me though is why Dunsparce doesn't carry Lum Berry to not get haxxed.
While I couldn't test submenceisop's team (sorry!), it seems to have problems after Silver Greta (as we all do lol). However, even through Actaeon's inconsistency, his team has the potential to reach over 60 wins, so he gets my second place.
To be perfectly honest, if I could, I would have voted for myself along with wtset, since in my experience the results of both teams were around the same. For fun, I decided to combine some ideas of the two and replace wtset's Gastly with my Dewgong for a surprisingly solid showing. In most cases, Dewgong can take out the opponent's first Pokemon either through a KO or adjudication, and can even take out the 2nd in a lot of situations. If it can't, then it can set up Perish Song and stall, then Glalie comes in and prepares for Huntail as the 2nd mon dies to Perish Song. Then, on the last mon, you can decide to either kill it with Ice Beam, or Explode and go into Huntail if it doesn't die. Glalie -> Huntail is also better setup -> kill strategy than Chimecho -> Pikachu imo, that can save more situations as Glalie can practically take one of the opponents out with Explosion and Huntail can beat nearly anything 1-on-1 as long as it doesn't get haxxed. The repeated typings isn't really a hinderance in my experience, is actually somewhat poetic lol (Ice - Water/Ice - Water).
As a final conclusion, I will say that I was under the impression that we couldn't switch moves up depending on the round. Since that is not true, simply switching Pikachu's HP Ice to HP Ghost could make Round 4 leagues easier rather than having to change to a Pika lead and risk 6 battles before Greta.
Votes: wtset - 3, Actaeon - 1
Oh yeah, the reason for no item is, of course, that Thief won't work otherwise :)