I've been lurking around this thread for ages and, to be honest, I really thought I'd have a couple of streaks on the list by now. Unfortunately, I've been pretty busy IRL and so haven't really had much time to do the subway. I've only used this team twice and got streaks of 67 and 102. I would've liked to try a couple more times and maybe a few different teams, but it looks like I'll have even less free time now, and so I figured I'd post this now, while I have the time. The proof is below. Sorry for such shitty quality, my webcam is no good lol.
As you can see, this is a singles team. Originally I had Latios, Metagross and a Vaporeon, and I used that for the Battle Institute, to get my Master Rank, and up until battle 26 (I think, somewhere around there, at least) when I decided that I had had to toxic stall the opponent one too many times and almost got beaten by a crit. I then looked at the team's typing and added in a Togekiss, because it had decent bulk, good type synergy with Metagross and Latios.although, I decided to use a scarfed Togekiss from Gen 4, with Air Slash, Aura Sphere, Flamethrower and Trick, since I basically just needed it to revenge random stuff, that Latios and Metagross couldn't/didn't. Pretty soon, I began to lead with it since Trick is awesome, and I could set-up either Latios or Metagross on most attacks aimed at Togekiss if I needed to.
This team plays pretty simply, I guess. Hax with Togekiss. If threatened, switch out to either Metagross or Latios, both of which only need one turn to set up (if at all).
Togekiss @Leftovers **FLINCHBOT
Yeah, so I said it was a scarfer in the intro, but pretty soon, I figured that it wasn't working as well as I'd thought, when my streak ended at battle 54. Pretty soon after I decided that a Sub-T-wave set would be better, since if I got a free sub, it would be pretty much gg and haxing the subway was really appealing. Plus, Togekiss is awesome. So I did, and it worked out really well. The best thing about this is probably that it makes matches go much quicker, since the cripple-1st-poke-for-one-to-sweep matches tend to drag on a bit, and I can be a bit impatient like that. Sub also allows me to scout the set of opposing pokes, which, although minor, is a nice perk. If i were to RNG another one, I'd probably get a Timid one, since speed is so important and you often outspeed alot of random stuff in the subway that runs weird spreads like 176 speed EVs or 0 speed, (like 724 | Volcarona | Bold | White Herb | Overheat | Quiver Dance | Bug Buzz | Protect | HP/Def). I'm not sure the exact number of Pokemon you outspeed with Timid that you wouldn't otherwise, but that's something I'd look at if I were going to try again with this team.
Metagross @Lum Berry **METALBOT
This may seem like a weird set for the subway, but its good, I assure you. I originally had a 4 attacks Metagross with Zen Headbutt over Hone Claws for the Battle Institute, where hax isn't as much of an issue, though soon after I started I began to get really paranoid about missing with either of those attacks. As a result, I switched Hone Claws in for Zen Headbutt, because between Metagross's nice bulk, nice coverage between Steel/Ground and great resistances its easy to get a Hone Claws up, after which I can reliably use Meteor Mash. This takes rock and ice attacks aimed at Togekiss, and super effective hits aimed at Latios.
Latios @Life Orb **DRAGANBOT
Latios covers Metagross's weaknesses and vice versa etc. I originally had Jumpman16's Latios for the Battle Institute (with Surf over Psyshock) since it got awesome super effective coverage. Eventually though, I figured that since Thunderbolt was rarely used, and Dragon Pulse seemed to leave everything at 1hp, I could drop Thunderbolt and make up for the drop in power against Water types.
In the end I enjoyed using this team, but I would have liked to try a couple more times with it and refine it etc. I also would have liked to try DD Dragonite over Latios in the last slot since it and Metagross cover each other's weaknesses perfectly, though I guess I'd lose that electric resistance and being unable to tank Starmie Ice Beams w/o Multiscale would suck. Anyway, if someone else wanted to try this or some variation of it, that would be really cool, and good luck to everyone else riding the subway.
Have a nice day.