Alakazam : Outspeeds a lot of poke, and Sash Alakazam should be able to KO most pokemon given the high special attack. Can run Dazzling Gleam and Energy Ball to act as Dragon and Water check. However, it is pretty useful to set up as well. T-wave + Sash + Magic Bounce + Taunt prevents SR/spikes, and also slows down fast sweepers with T-wave. Is pretty fragile, but it has is niche, and I don't see it falling further below. (Stays B)
Politoed: All the hype about rain teams is just a fad, I feel. Once people start moving away from swift swim, politoed will be pretty worthless. Since it provides nothing much apart from bulk, I don't see it comparing to A pokemon, such as Swampert, Ice Beam/Mega Pedo, and Volcanion, since each of them provide checks to a weakness. It has a niche to set up rain dance, but a lot of other B rated mons can do that as well. (Stays B)
Smeargle: This is probably the only change I strongly agree with. It is viable for Hyper Offense teams, but it can also be used for coverage. It's extremely diverse movepool allows you to use it to cover any type you are missing. For example, having a smeargle with dark pulse adds coverage for ghost types, while having immunity to ghost moves. Apart from this, smeargle, much like I said for Alakazam, can act as your opening pokemon, given that it learns so many great moves. Sash+Smeargle with Dark Void/sticky web, Spikes, Stealth Rock, Toxic Spikes could be the perfect set up. Similarly, Toxic + King's Shield + Cotton Guard + Aromatherapy/Heal Bell/Recover fits perfectly into a stall team. I don't see Smeargle as an A, mainly due to Moody Clause, but it still deserves a B (C--> B)
Staravia: I really wonder why Staravia is being considered. There are much better bulky mons, and you'd be better off with Porygon2 or Staraptor. ArkenCiel did mention that it can stand in for a staraptor allowing the staraptor to be scarfed, but I really don't see the point in that either. Mega Pidgeot is common on any team that doesn't use mega lopunny (believe me, I've seen quite a few). If you choose to use a Staravia and Staraptor as well alongside the Mega Pidgeot, on a normal team, you leave yourself quite open to attack electric/rock/ice teams, and just building counters for these three types it self takes up valuable slots. Personally, I feel Staravia should stay where it is. (Stays D)
Cobalion: I feel Cobalion should stay at C. Moves like Volt Switch and STAB Close Combat provide some checks on a steel team, but there are better pokemon to that. Magnezone is common on steel teams, and having a magnezone which receives STAB on electric is probably a better check for Charizard/other flying types. Similarly, Doublade is pretty common too, and sacred sword is just as useful as CC, mainly because it can repeatedly be used accurately. Heatran and excadrill are a given on steel teams too, and I feel that stone edge/ancient power fits in better there. Since it does nothing for steel mono in this meta, I don't see a reason to take it to B. (Stays C)
Now, I realize this isn't up for discussion, but I would suggest that
should get a C instead. It should be added to discussions next week to know everyone's opinion, but I feel that Eviolite + SD + Aerial Ace Scyther is pretty useful on a bug. Even more given that it learns U-turn and can switch out when required.