Some notes on your team and on the thread in general:
This team is interesting, but I'd change a few things (assuming all Pokemon and their movesets stay the same). Mr. Mime should be using Filter instead of Soundproof (living a super effective hit is much more useful than blocking really situational stuff, like Chatot's Boomburst for example). Rampardos also needs a little more Special Attack in order to OHKO Sturdy Dwebble with Surf. 128 SpA gets the OHKO: 128 SpA Mold Breaker Rampardos Surf vs. 0 HP / 0 SpD Dwebble: 242-286 (100.4 - 118.6%) -- guaranteed OHKO.
I've hit on this in chat before, but I'm also a fan of the team synergy you have going on with Purugly (Defiant + Fake Out) combined with Frogadier's Toxic Spikes. In my opinion, Purugly has a small niche over Pawniard, in that Purugly makes a more effective partner to Toxic Spikes because of Fake Out's ability to add an extra turn of poison damage for free (assuming the opposing mon isn't a Ghost, obviously). Nice job there.
What I might not be a fan of, however, is the lack of defensive switch-ins this team has for Pokemon common to the meta. If you're facing Zebstrika, the best you can do is revenge it with Mr. Mime (assuming it hasn't already Volt Switched out), or Fake Out with Purugly. Taking into account that Rampardos has probably already used up its Focus Sash at the beginning of the battle trying to set SR, you wouldn't have anything for potent offensive threats like Shell Smashers (especially Barbaracle), Pawniard, or CB Scrappy Stoutland. What's more is that there's not even an Electric immunity to stop momentum gained via Volt Switch.
In other words, by ignoring these common threats, you could say that this team is basically throwing out conventional team building basics in favor of cramming as many low-ranked Pokemon on one team as it can in order to achieve the highest score possible. You could therefore argue that this thread has the potential to make the PU ladder even worse than it is right now. I already see plenty of gimmicks on the ladder as it is, so I wasn't exactly ecstatic when I saw Choice Specs Regigigas a little less than a week ago. Instead, what I really want to see is more effective team building that actually addresses the PU meta as a whole by taking into account how to beat relevant threats, while not starting the game 5-6 (with your sixth mon being a clearly acknowledged gimmick). I more or less understood the main purpose of this thread as a challenge to incorporate infrequently used Pokemon into functional teams in order to examine how effective the Dark Horse was, why it worked, and what sets it could use that would make it viable.
By using multiple, low-ranked Pokemon on the same team, you're essentially allotting less analysis to each Pokemon and placing more emphasis on the end score, which takes away from the original value of this thread. One way to look at this could be: would you submit any of these teams as a sample team? And if so, would they be accepted? Were these novel tactics actually effective, or just something to alleviate boredom in a stale meta? New standards can be made if what you've shown off in this thread is truly effective and if enough analysis of each individual dark horse candidate has been done.
I'm really posting this to just say keep ladder quality in mind when you're laddering with and posting Dark Horse teams, and to keep analyzing why the Pokemon you used was effective, while refraining from using replays against clearly new players as justification for why your Dark Horse candidate worked.
