Fletchinder is also a usable niche pokemon
Although it doesn't get brave bird, a SE Acrobatics still OHKOs many offensive threats below the 100/100 bulk tier, which is the only thing its supposed to do anyway.
It could be at 1 rank below ditto, around C.
Nothing against you Kadabruim, but this is probably the worst nomination I've seen in this thread so far - Dusclops and Dusknoir at the very most could make F-Rank, as their typing and stats do give them a fractional amount of merit in XY UU (they still shouldn't make the list however). It's evident that you're trying to help add to this list, but you should probably familiarize yourself with the tier first. Unlike those two however, Fletchinder has
zero merit in the XY UU Metagame, as it is beyond outclassed by anything that carries a Flying-type move. Both Tornadus formes are available, Crobat is available, Hawlucha is available, so what reason is there to ever consider using Fletchinder? It doesn't get Flare Blitz, and it's best bet at maneuvering around Steel-types is a Fire Blast coming from a paltry base 56 Special Attack stat. I see no reason to even bring this Pokemon up for whatever reason, as literally everything it could do, or hope of doing, is done better by so many other Flying-types in this tier. None of which share Fletchinder's 4x weakness to Stealth Rock either (unless you're running Moltres, which isn't nearly as bad). The only reason I could ever see to use one is on a Baton Pass chain just to abuse Gale Wings when backed by a tremendous amount of boosts. Final verdict?
Do not rank Fletchinder, it is terrible. Kadabrium, I recommend you hop on the IRC channel #xyuu. Myself and a ton of other veteran members are there, meaning there's an opportunity there for you to better yourself with the game and provide
better nominations.
I'll take this time to respond to your stance on Vivillon vs Venomoth, and I don't
entirely agree with you. While I agree Vivillon shouldn't be ranked higher than Venomoth, I believe they should be ranked equally. Vivillon has access to Compound Eyes, making both Sleep Powder and Hurricane significantly more accurate, which is a huge boon for what it tries to accomplish. At the same time, Venomoth is partially immune to moves such as Roar and Taunt thanks to Wonder Skin, which can make setting up significantly easier. Each individual Pokemon has their pros, and both essentially share the same cons, so I see no reason for these two not to be ranked together. They're essentially the same Pokemon, just with two slightly contrasting upsides.
B-Rank for both Venomoth and Vivillon.
Uhh, and I don't have much of a position on
Dusknoir, but simply because of the buff to Knock Off, I'd be okay with it in
D-Rank. Anything with Knock Off and any usable combination of typing, stats, or movepool should be able to crack this list, even if on the lower end.