Obviously the bottom tier mons are not priority, but i feel like few of these has just good enough niche to be D or maybe low-C:
- Parasect
- Butterfree
- Exeggutor-A
- Clefable
- Dragonite (?)
- Slowbro/Slowking
As for mons itself:
- Parasect has super shit stats and typing, but it still holds a niche with rage powder + spore (and wide guard). Its closest thing you can get with Amoonguss. Also 4x resist to ground is great which allows it to redirect Tectonic Rage from Chomp, which alone is quite hilarous.
- Butterfree has equally shitty stats, but it does get fast sleep option and rage powder. Its pretty much only "offensive" sleep spreader in the meta.
- Exeggutor-A has shitton of weakness but it has cool trick as Z-Trick Room + Sleep Powder / Hypnosis. It would have potential with correct support. I think that Harvest sets could work, too.
- Clefable is just shadow of former itself (and i dont mean that Clefable is Gengar now :P ) but its still only redirector along with its pre-evo that is bulky and doesnt have shitton of weakness like Parasect. It doesnt have icy wind, it doesnt have good offensive pressure, minimize is just unreliable, but despite that the fact its just...bulky, and...has follow me gives it a niche. Ive seen few Clefables in high rankings that havent been a part of gimmicks. Clefairy can stay in Z-Rank though because it has absolutely no offensive pressure.
- Dragonite as physical attacker is generally outclassed by Garchomp and to some extend, Arcanine, while special set is somewhat outclassed by Salamence, Goodra and even Kommo-o. Dnite however has few tricks which imo should be just enough to make it bottom of D rank. It is quite bulky thanks to Multiscale, making it hard to OHKO from full HP. It has great Atk stat + Espeed, so a WP set would work...okay, i guess. On Special side, Dnite carries some coverage moves like Thunder, Hurricane and Ice Beam, which most Dragons dont get access to. I dont think this is very "viable" mon but it has enough tools to take it for consideration for D-rank.
- Slowbro/Slowking can fit akward role of bulky water - TR setter at same time. They also get (weirdly enough) Flamethrower, which means that they threaten 2 mons out of 3 of AFK core (while can tank multiple hits from the 3rd one). They also get Oblivious so they cant be taunted. I feel like they should be ranked together because they are otherwise identical but just has differences on defenses: Slowbro can tank Leaf Blade from kartana with enough investment while Slowking can tank Tbolt from Koko outside of Electric Terrain better than Bro does. I think that Bro is slightly better than King, but i think that they could be ranked at same ranking.
Not important nominations or anything but if one starts to put D-rank mons, i think these are few ones to consider.