Name: The Ultra Beasts
Types: Remain the same unless otherwise noted:

Electric
/Poison;

pure-Steel (
loses Rock)
Abilities, New Moves, & Justifications: Beast Boost remains primary for everyone. I'm just going to lump new hidden abilities (in bolded italics) and new moves and justifications together since that seems easier and more readable as
I steal from Bobiscan's Slate 04 Ultra Beast entry for like half of these mons:
Tinted Lens (already gotten}; Calm Mind, Clear Smog, Earth Power, Energy Ball, Mental Gymnastics, Millstone, Recover {all already gotten back in Slate 07} [00]:
Already adjusted in Slate 07. Tempted to give it back Petroleum Blast, but I'll go with the council's wishes of it not having it that
which slightly increases the chance of it getting it back at the same time it's given to the Rock fossil mons en masse.
So instead it gets Virulent Blast, which seems safe enough. (
2025/03/14: Apparently Virulent Blast would likely still be too much for it, so it can't get the either. Whomp whomp.)
Dry Skin; Flex Off, Triple Kick {already gotten} + Body Press, Stealth Rock, U-Turn, Salve Strike, Beak Blast, Triple Dive [06]:
Poison Heal on this thing seems like it would be obnoxious as much as I liked the majority of Bobiscan's suggestions otherwise, and the new Lifedrain would fit but likely be even worse while Triage would just step on Bewear. So instead an entirely new direction puts those muscles to use to give Rain a new toy it would actually use (unlike poor Runerigus who I probably should have just given Water Absorb instead) even though this probably shouldn't get the Swift Swim I was considering giving it, if only due to it having Flex Off. So it now gets Dry Skin instead--keep away from flames.
Velocity; Barb Barrage, Swarming {already gotten} + Knock Off, Psycho Cut, Virulent Blast, and Powder Bomb [04]:
Just going with Bobiscan's suggestions aside from adding Psycho Cut, Virulent Blast, and Powder Bomb too given Pheromosa isn't escaping Ubers where she belongs. (Would have probably given her Long Reach otherwise.)
Keep Cool; Parabolic Charge {already gotten} + Mortal Spin, Sludge Bomb, Sludge Wave, Toxic Spikes, Toxic Thread [05]:
I think that putting a speed-doubling ability for the arguably strongest weather this gen on this
and giving it additional STAB that blows up Grounds is probably a bad idea even as middling as Electric/Grass is defensively. So instead this now channels plastic's toxic aspects, gives it something to defend against Frostbite while meaning it casually blocks half of the relevant statuses, and finally puts both Toxic Thread and the Electric/Poison typing on a worthwhile mon--sorry Ariados and Toxtricity. Keep Cool should be fine given it forces Xurkitree to keep its middling speed as well as give up its item slot if it wants to guarantee it.
Heavy Metal {replaces Light Metal}; Hammer Arm, Railgun, Recover, Squall, Zephyr Blade {already gotten} + Flame Burst, Land's Wrath [02]:
Rectifying a mistake in suggesting to give this Light Metal instead of Heavy Metal, which can go to Kartana instead. Going to be otherwise conservative and only give this Flame Burst and Land's Wrath since both Worry Seed and Petroleum Blast would likely be too obnoxious on it.
Light Metal*; Scythe Limbs, Zephyr Blade {already gotten} [00]:
Already hits like a truck with great typing, so it gets the least of anyone, though Light Metal would actually be a boost if my proposed moves win. (*If they don't or if they don't but Light Metal is deemed too much of a boost on this thing for Sleek Sword, then I would be fine giving this Hyper Cutter or Clear Body [or Liquid Body] instead. Hyper Cutter is almost the same as the Clear Body that Bobiscan suggested for what matters most while being more flavorful, and obviously we can't give this Sharpness without making it Ubers-worthy.)
Sinistrous {already gotten}; Quicksand Drain {already gotten} + Shore Up, Scythe Limbs, Dragon Hammer, Imprison, Dragon Rend & all Fang moves {Fire, Hyper, Ice, etc.} [12 (05 + 07)]:
I would give this Strong Jaw, but between Sinistrous doubtless working better for it if I'm keeping it Dark/Dragon and the change to most biting moves meaning that its low Speed screws it over there too, the closest boost I can give with regards to biting moves is just giving it all of them alongside Imprison to punish anyone that else that has them, especially Dragon Rend. It weirdly didn't/doesn't already have the new Dragon Hammer. Huh.

&
Speed Boost; Barb Barrage, Twister, Zephyr Blade {already gotten} + Toxic Thread, Railgun, Caltrops, Virulent Blast, Dragon Rend [05]:
Just going with Bobiscan's previous entry because gods I don't care about these mons and because Naganadel is never leaving Ubers anyway. I'll add a few new moves though since I want to give them at least some effort.
Magic Bounce; Pebble Storm, Railgun, Gravel Grater, Caltrops, Millstone {already gotten, though only the first two show up on the Spreadsheet currently} + Curse, Shore Up [02]:
This, which is Bobiscan's suggestion aside from Shore Up over Recover, might be too bulky now with Magic Bounce and no longer being burdened by Rock typing. Honestly would be fine with readding Rock typing before trying to take anything from this to see how much it mitigates its obnoxiousness.
Regenerator; Burning Jealousy, Infernal Parade {already gotten} + Recover, Flame Burst, Sonic Boom, Powder Bomb [04]:
I hate Regenerator, and like Poison Heal we really don't need another one, but it honestly does fit for this thing, which will still have to wear Heavy-Duty Boots or waste a slot on Recover if it wants to abuse Mind Blown to its fullest and actually live, especially since Pursuit can destroy it. If anything, then either Recover or Flame Burst (or both) is maybe the most objectionable thing here.