Delta Volcarona (Armored)- Probably too high, it’s not going to be as meta-defining as the other S ranks. It is a decent hazard setter/remover/specially bulky pivot; I think it should go to A for now.
Delta Metagross Ruin (Mega)- Should go straight to S. It has has few switch ins in OU that don’t get 2HKO’d, even when it’s Jolly.
(From top to bottom: Chesnaught, Ferrothorn, Aggron-Mega, Zygarde, two variants of Bronzong, Doublade, full Def Landorus-T, Magnezone- ignore because it assumes Air Balloon and it will die to Earthquake next, Tank Garchomp, Porygon2, full Def Tangrowth, SubCoil Zygarde)
Most of these do not have recover and the last few can be 2HKO’d after Stealth Rock. This does not include Insurgence additions but I don’t remember anything that would work other than Delta Muk and Mega Jirachi.
Although its defensive typing is pretty bad, it’s still bulky enough to not get OHKO’d by a lot of things that can try to revenge it (notably lives Scarf Keldeo Secret Sword, Scarf Magnezone Flash Cannon, Band Delta Blaziken Brave Bird, and has a 50% chance to live Scarf Terrakion Close Combat). It also has a slot for Synthesis, which is actually decent given how it can force switches.
Feraligatr (Mega)- should go down a least a few ranks. It’s actually slightly weaker than normal Feraligatr. It plays similarly to the base form, although higher bulk and enough speed to outspeed a few slower Scarfers does help against a few of its previous checks. Personally, I’d say with B or so until it shows more value.
Delta Volcarona- I don’t think this is much better than Gengar. It has the advantage of having a few more coverage moves, U-Turn, resistance to Pursuit, Psychic immunity, self-healing, more bulk, and some status moves like Thunder Wave and Toxic Spikes. However, it gives up important aspects like the Speed tiers, the Normal/Fighting immunity, and the general better neutrality of Ghost STAB vs Dark STAB (ex Keldeo can switch in on predicted Dark Pulse but not Shadow Ball). Should probably go in the same ranking as Gengar, or maybe 1 higher (but I don’t really think it should).
Delta Scizor (Mega)- I’m going to say that I don’t think the huge circlejerk about it being bad is inaccurate. It’s strong but the speed and large number of weaknesses is too much. Should be C in my opinion.
Delta Bisharp- The offensive typing is pretty cool and the ability to actually absorb Defog instead of just punishing it is interesting. However, low speed and not having a good Flying move besides Acrobatics in its base form means that it can’t really be used to its full potential as an attacker. It’s not that strong without an item without boosts and with an item it’s mostly inferior to a lot of other Fighting types. I think that it should be at best B, and I think there’s a strong argument for B-.
Delta Tangrowth- I don’t think this is better than Hippowdon. Advantages are ability to use Knock Off, having Dry Skin (which I don’t think is that relevant since a lot of Water types beat it anyways), and the ability to use a few surprise moves such as Power Whip and Flamethrower. In return, it no longer checks physical Flying types like Delta Blaziken. Same rank as Hippowdon at best, in my opinion.
Delta Dugtrio- This thing is pretty bad. Fur Coat doesn’t change the fact that it’s super glassy. Hail teams aren’t very good either. It’s Attack is too low for Extreme Speed to be good. It’s outclassed as an Extreme Speed user by Delta Arcanine and as an Ice type by Mamoswine. I actually think that it can go straight to Unranked.
Currently Unranked additions:
Delta Arcanine- This isn’t on here and I think that it’s actually pretty good. It has Multiscale and Extreme Speed like Dragonite, but actually has Normal STAB and Swords Dance. It doesn’t have physical Fire coverage like Dragonite, but Flamethrower/Fire Blast work well enough to remove those Steel types after they’re weakened. Should be at least B like Dragonite, and maybe B+.
Delta Crustle- This thing is ridiculous. Many of the things that don’t die to a combination of +4 Return, Earthquake, and Knock Off is trapped by Magnezone. Knock Off isn’t super important either; HP Fire is decently strong at +4 and can pick off Ferrothorn and PhysDef Skarmory. The only things holding it back are that it can be picked off by priority and that it’s hard for it to find any super free setup opportunities. The only viable thing that can outspeed it outside of priority is Jolly Excadrill in sand (and it can outspeed even that if it runs Jolly itself, although I think that’s pretty bad). The Simple ability does mean that Intimidate drops its attack by 2 stages, but it’s still decently strong after that. There are some things like TWave Slowbro, PhysDef Tangrowth, Hippowdon that can live one hit and stop the sweep, but they have to be pretty healthy to do so. I think that it deserves at least A+.