Okay, couple things I feel need to be pointed out before this thread gets too far along.
1) The tier a Pokemon is in has no affect on how viable it is in RU, for example Alomomola last gen was a NU Pokemon, but depending on who you asked it was either S rank or High A rank. It was actually higher on our viability thread than on the NU viability thread. Posts such as, "This pokemon is in NU and does not belong in the ranks," will not be tolerated.
2) When DTC and the rest of us went through making the initial list, we decided to be very strict, in most threads D rank is like "absolute shit, do not use this rank," in this thread D rank is "this is viable, though frankly I am not sure why you are using it". Unlike many other viability ranking threads, we are trying to avoid the trend of being way to optimistic about where Pokemon fit in these ranks (in fact OU and UU are going back through their threads trying to deflate ranks right now).
3) Please try to avoid posting shitty one liners, and if you are going to respond to someone's post please address their propositions (no matter how ridiculous) with good reasoning.
Anyways now that I addressed that, I will speak about some of the noms (the ones that I don't think are due to rank inflation).
Delphox to S is not something I oppose, as it is frankly the hardest Pokemon in the tier to switch into unless you are Slowking. Unlike a previous poster mentioned, Delphox is not limited to a Choice Specs set, its Calm Mind set makes Slowking or SpD Alomomola pretty much mandatory on stall, and Alomomola is still likely to lose unless it has Waterfall or Mirror Coat instead of the otherwise much more useful Scald. I've found a Choice Scarf set to be quite useful as well, out speeding most opposing scarfers, and having access to Switcheroo which prevents it from being dead weight against stall (impressively good against stall for a choice scarf Pokemon).
Sceptile to A-/B+ once again not something I oppose, but I guess I don't see any of the B+ Pokemon being better than Sceptile, and unlike last gen where Accelgor and Aerodactyl were good (mostly Aero) and common, its speed tier is unmatched by all pokemon S-B- rank barring Dugtrio, who, lets be real, is still losing to Sceptile. There is definitely something to be said for having a Pokemon that is fast without the need for a Choice Scarf. Also the HP nerf didn't really hurt Sceptile
that bad since it was, and still is aiming for 4x effective Pokemon such as Moltres (HP Rock) or Escavalier (HP fire). This can either stay where it is or move to A- because while I still think it is a good Pokemon it has become a lot easier to deal with than it was last gen.
Whimsicott to A- seen a lot of requests for this, and I am not really understanding why it deserves to jump up this high. If someone wants to let me know what set they are running, that would be cool. I mean I guess I would only ever use like Encore|Taunt / U turn / Stun Spore / STAB and I don't see that being any more than a properly fulfilled defensive niche (B rank), Sub Seed sets just lose to every grass-type in the tier, so I'm not a fan of them. For now I'd
Leave Whimsicott in B.
I'd also be fine with Amoonguss going up to B+, as Spore + Poison STAB means that something is going to sleep unless the opponent has an Escavalier (to bad those are everywhere). I don't think Vivillon should move up, it is really hard to set up against offensive teams, Escavalier poops on it and that is on every bulky offense team, and it doesn't really hit hard enough to break stall. Not to mention it absolutely needs Defog support to function, and is also partially out performed by Venomoth (fits the B rank definition). Smeargle moving down to B+ is fine with me as well, as it is outclassed by Shuckle as a Sticky Web setter, and the only thing it really has over Froslass in terms of usefulness is Spore / Dark Void.
Also added Medicham to C+, nice catch
Honko B)