Your examples don't all match the stated premise. The stated premise is that only the stat changes are affected, but some of your examples suggest that other effects of stat-altering moves would swap targets as well. And you're not even consistent within the examples: some examples (Parting Shot, Belly Drum) state that all of the effects would swap targets, while others (Bulldoze) suggest that only the stat-altering effect would switch targets.Uno Reverse:
All stat changes have their effect AND target reversed.
This means that stat changes that normally raise stats will lower them and effects that target the user will now target the opponent, as well as vice versa. For example, Growl will now raise the users attack by one stage. Assume that accuracy is “- -“ for all moves that change their target / self range.
This will largely affect set up sweepers, as moves like Swords Dance, Trailblaze, and Nasty Plot no longer can be used on sweepers. Instead, moves like Feather Dance, Low Sweep, and Eerie Impulse take their place. Other moves like Belly Drum, Parting Shot, and Defog have drastic changes. This OM also affects abilities and items, so Intimidate and Electric Seed, for example, see offensive buffs.
Sets:
Hawlucha @ Grassy Seed
Ability: Unburden
Tera Type: Flying
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Feather Dance
- Acrobatics
- Close Combat
- Encore
Grassy Seed will lower the target’s Defense, activate Unburden like usual, then Feather Dance in leu of Swords Dance for sweeping.
Persian-Alola @ Heavy-Duty Boots
Ability: Fur Coat
Tera Type: Electric
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Parting Shot
- Dark Pulse
- Thunderbolt
- Burning Jealousy
Parting Shot now targets the user, so in the same vein of using Parting Shot on a Magic Bounce target, it will now force the foe to switch, and raise the users Atk and Spa by one stage. Alolan Persain and others can Parting Shot to shuffle foes while netting offensive buffs all the while.
Slowking-Galar @ Heavy-Duty Boots
Ability: Regenerator
Tera Type: Water
EVs: 248 HP / 252 SpD
Sassy Nature
IVs: 0 Atk / 0 Spe
- Belly Drum
- Future Sight
- Sludge Bomb
- Chilly Reception
Now this is just silly. Belly Drum lowers the target’s Atk by 6 stages and halves their health. Great way for a special wall like Glowbro to nerf physical attackers while also doing consistent damage.
Raging Bolt @ Booster Energy
Ability: Protosynthesis
Tera Type: Fairy
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 20 Atk
- Eerie Impulse
- Thunderclap
- Dragon Pulse
- Thunderbolt
Buff over CM. Zapdos gets Eerie Impulse too.
Hatterene (F) @ Assault Vest
Ability: Magic Bounce
Tera Type: Water
EVs: 252 HP / 100 SpA / 104 SpD / 52 Spe
Modest Nature
- Mystical Fire
- Draining Kiss
- Psyshock
- Nuzzle
+1 Spa per Mystical Fire, could be good for stallbreaking.
Ogerpon-Cornerstone (F) @ Cornerstone Mask
Ability: Sturdy
Tera Type: Rock
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Ivy Cudgel
- Power Whip
- Low Sweep
- Encore
Tera to lower the target’s Def by one stage, great for wallbreaking. Low Sweep to hit Steel-types and for the Spe raise for cleaning
Landorus-Therian @ Soft Sand
Ability: Intimidate
Tera Type: Flying
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bulldoze / Scary Face
- Stone Edge
- Tera Blast
- Taunt / Earthquake
Intimidate is broken, right? Well, lando t can also use Bulldoze or Scary Face for Spe buffs.
Lokix @ Silver Powder
Ability: Tinted Lens
Tera Type: Bug
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Lunge
- Sucker Punch
- First Impression
- U-turn
Lunge can be used to both attack and setup, then allowing for a late-game Sucker Punch sweep.
Zamazenta @ Life Orb
Ability: Dauntless Shield
Tera Type: Dark
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Close Combat
- Crunch
- Heavy Slam
- Stone Edge
One time to lower target’s Def and hit hard. However, no Body Press sets would be a huge nerf.
Bans, watchlist, unbans:
-Memento: would target foe, KO them, and raise users Atk and Soa. lol no.
-Defog: targets the user, raises evasion. Banned under evasion clause. LMAO.
-Intimidate: probably broken, or we can see if a couple abusers like Lando T and Arcanine can go first before banning the ability.
-Parting Shot and Belly Drum: not sure if either are broken yet.
-Volcarona, Espartha, Flutter Mane, Roaring Moon, Magearna, Gouging Fire, Ogerpon-Hearthstone, and Spectrier: unbanned as they now lack crucial setup moves / abilities.
Check here for all moves that affected:
https://m.bulbapedia.bulbagarden.net/wiki/Category:Moves_by_stat_modification
Parting Shot is obviously banworthy if it works as in your example; it's way better than Comatose + Sleep Talk + Whirlwind, which is banned in AAA, STABmons, and Balanced Hackmons. Belly Drum is almost certainly broken as well if it cuts the opponent's health rather than the user's.
Moves like Superpower and Draco Meteor become a lot more viable on sweepers, since they don't reduce the user's stats and the boost to the opponent's stats doesn't matter if the opponent is KOed.
Sticky Web could allow even a slow mon to sweep, since it gets a speed boost every time the opponent switches.










