Wow, I lost quite a bit of discussion. Many suggestions are good, others not that much, let me comment about them a bit.
Infernape is a sweet pick right now, it utterly destroys CeleTran and Mamoswine right now, resists Ice Shard, and only gives 1 chance to switch-in to Rotom (since it takes over 50% by Close Combat). I was going to suggest a similar LO set, with Stealth Rock | CC | Overheat | U-Turn, that still cripples everything, and can easily set up Rocks since it forces a ton of switches. However, picking it would destroy the viability of Politoed, and since this whole "game" was based around that, I think we should give up or at least wait till the last pick to consider a Fire-type.
Picking
Politoed now is a great mistake, since they got two pokemon to abuse our rain against us. This was already discussed a lot, so I think we should just avoid picking it at all, or pick it as our last pick.
That
Virizion is...weird. It cannot really switch into Rotom since a Trick means it's complete garbage, and without Speed investment, it even fails to outspeed neutral base 100 with a Scarf. Mamoswine outspeeds and can KO if Icicle Spear hits more than three times. The worst thing is, however, that Team 2 has still 2 pokemons to take advantage of your "overspecialized" set, so I would avoid picking it.
Lucario is a good suggestion, not the one I like the most, but there are no apparent flaws in it. Being Jolly, it outspeeds Mamoswine and avoid being KOed by Earthquake. The only (very little) problem is that it fails to KO Rotom at +2 with Extremespeed sometimes, but it's not too relevant anyway. Definitely one of my preferred suggestions right now.
Hydreigon is flat out OHKOd by Ice Shard. Of course, you can play around Mamoswine, but I don't think it's a good pick: taking more Ice-weak pokemon with a Mamoswine in their team seems a bad route to me. EDIT: bad calcs are bad. However, Ice Shard still deals over 55% and Icicle Spear OHKOs most of the times, so the rest of my point still holds.
Kyurem is a nice suggestion, being able to handle Rotom with ease, and to threaten all the remaining Team 2 members with its power and good coverage. The biggest problem in it is the SR weakness; we have only 2 remaining pokes to pick a Rapid Spin user (to alleviate said weakness) AND an hazard setter, so unless we pick something like Donphan or Forretress (but it seems completely out fo place in an offensive team) we're kinda predictable and/or forced to do certain choices. For example, say we pick Starmie after this (or a Spinner in general), they will be sure we don't go Rain since we need a SR setter. Avoiding a Spinner at all is an alternative too, but it becomes harder with 2 SR weaknesses, only 1 resistance and many Life Orbs to stack up residual damage...
I'm not sure about what direction Team 1 has to choose right now. You guys are all proposing offensive pokemons that fit well into a HO team; however, I feel that we should pick our hazard setter ASAP (it can be offensive too, no need to pick Forretress or the likes) and delay further offensive threats for our last 2 picks. I'm thinking about what fits better for us right now, I guess I'll suggest a SR setter of some sort soon. If I can't find something satisfying enough, I'm probably supporting Kyurem or Lucario suggestions, still need some more thinking about them.
EDIT: Okay, going to add my entry. Credit goes to
PapaBearAds, that already suggested it a couple of pages ago, when we picked Thundurus. Still, it's the best hazard setter that we can find, so I'm going to nominate it again!
Deoxys-D @ Leftovers
Trait: Pressure
EVs: 252 HP / 4 Def / 252 Spe
Nature: Timid
- Stealth Rock
- Spikes
- Taunt
- Night Shade
Deoxys provides the hazards our sweepers need to be effective when killing things. The fast spiker set ensures that Celebi can't set up NP or Thunder Wave, since it's slower and will be Taunted first. Heatran ca't set up SR for the same reason, and both deal pathetic damage in return. Hydro Pump from Rotom-W only 3HKOs (and thanks to Pressure, doing so will leave Rotom with only 2 Hydro Pumps for the rest of the match), giving Deoxys plenty of time to set hazards; of course Trick cripples Deo, but that's true for almost every hazard setter, so it's a necessary evil. Mamoswine is the main threat here, but it still need SR up to 2HKO with Earthquake: this still means at least 2 layers of hazards for us, and quite a bit of LO recoil for them. So, to sum up, Deoxys can set up safely on at least 2 pokemons Team 2 picked, and still is not that bad against the other 2 (only Mamo is slightly troublesome), fixes up our hazard deficit and makes hard for them to lay theirs. It fits perfectly in our HO or Balanced Offensive, whatever it is, strategy so it seems the perfect pick right now.