What counters RevivalCats in Gen 9 NDAG?

Question

If you don't know, RevivalCats is the usage of Liepards with Assist, every other Pokemon on the team has no moves that can be copied by Assist, such as for example, Shadow Force, whilst the only move that can be copied will be Revival Blessing. That means these Liepards can spam Revival Blessing to their heart's content.

I am asking for counters against this strategy even though Natdex AG is now not a public format due to the fact that a random showdown mod is challenging people to a gauntlet and using a specific variant of the RevivalCats team featuring 3 Liepards that have this set:

Liepard @ Rocky Helmet
Ability: Prankster
Tera Type: Dark
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
- Assist
- Thief
- Endure
- Copycat

and some other Pokemon:

Giratina @ Leftovers
Ability: Pressure
Tera Type: Steel
EVs: 252 HP / 4 Def / 252 SpD
Careful Nature
- Shadow Force
- Protect
- Dragon Tail
- Roar

Smeargle @ Rocky Helmet
Ability: Moody
Tera Type: Normal
EVs: 252 HP / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Baneful Bunker
- Transform
- Destiny Bond
- Revival Blessing

Ditto @ Choice Scarf
Ability: Imposter
Tera Type: Normal
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
IVs: 30 Atk
- Transform

(I don't know the ditto's stats)

Comments

Since Gen 7, Prankster moves don’t affect Dark types. Transform does copy stat changes.

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Okay. Sorry about that.

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Not a full answer, but a Fairy Type Setup Sweeper with Taunt would counter everything except Ditto if played right.

If No Guard Fissure Machamp is still Legal, that with a Flying Tera Type and coverage could also eliminate Ditto, but you’d have to work around Revival Blessing as well

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Here's some stuff I have tried:
Triage draining kiss comfey (takes care of everything except giratina) (also dies to rocky helmet)
Espeed mega rayquaza + extremekiller arceus (dies to rocky helmet and can't handle giratina) (ditto copies changes)
Baton pass Breloom Mach Punch + CC (eyes ditto)
every single hazard known to existence (dude dittos and rapid spins)

In all honesty I just really need a non setup mon thats faster than liepard, has +1 priority, and can handle giratina.

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Why not just use the Special Scarf Lucario, then Mega Gengar for Giratina?

Triage Comfey sounds fine too, especially since Draining Kiss restores the Rocky Helmet damage.

Answer 1

Special Scarf Lucario, LO Koraidon, and Silk Scarf E-Killer.

Lucario can take care of the Liepards with Vacuum Wave thanks to Choice Scarf and the EVs letting it outspeed them, as well as Smeargle. Don't try the speed tie with Ditto, instead go to Koraidon.

Lucario @ Choice Scarf
Modest Nature
Tera Type: Fighting
Ability: Justified
EVs: 204 HP / 252 SpA / 52 Spe
- Vacuum Wave
- Dark Pulse
- Flash Cannon
- Dragon Pulse

• 252+ SpA Tera Fighting Lucario Vacuum Wave vs. 0 HP / 0 SpD Liepard: 308-364 (114.4 - 135.3%) -- guaranteed OHKO
• 252+ SpA Tera Fighting Lucario Vacuum Wave vs. 252 HP / 0 SpD Smeargle: 332-392 (105.7 - 124.8%) -- guaranteed OHKO

Korai can beat Ditto disguised as Lucario, as well as Smeargle and Giratina. It naturally outspeeds them all as well. As another great reason, it can beat Tera Steel Giratina with Collision Course, while taking Shadow Force.

Koraidon @ Life Orb
Jolly Nature
Ability: Orichalcum Pulse
EVs: 252 Atk / 4 Def / 252 Spe
- Outrage
- Flame Charge
- Swords Dance
- Collision Course

• 252 Atk Life Orb Orichalcum Pulse Koraidon Flame Charge vs. 204 HP / 0 Def Lucario in Sun: 393-463 (118.3 - 139.4%) -- guaranteed OHKO
• 252 Atk Life Orb Orichalcum Pulse Koraidon Collision Course (133.3251953125 BP) vs. 252 HP / 0 Def Smeargle: 1724-2028 (549 - 645.8%) -- guaranteed OHKO
• 252 Atk Life Orb Orichalcum Pulse Koraidon Outrage vs. 252 HP / 4 Def Giratina: 595-704 (118 - 139.6%) -- guaranteed OHKO
• 0 Atk Tera Steel Giratina Shadow Force vs. 0 HP / 4 Def Koraidon: 115-136 (33.7 - 39.8%) -- guaranteed 3HKO

E-Killer can handle Giratina (unless it goes for Dragon Tail, which only delays the inevitable). Unboosted E-Killer also takes care of Liepard, as an alternative to Lucario.

Arceus @ Silk Scarf
Adamant Nature
Ability: Multitype
EVs: 200 HP / 252 Atk / 56 Spe
- Extreme Speed
- Shadow Claw
- Taunt
- Swords Dance

• +2 252+ Atk Arceus Shadow Claw vs. 252 HP / 4 Def Giratina: 270-318 (53.5 - 63%) -- guaranteed 2HKO
• 252+ Atk Silk Scarf Arceus Extreme Speed vs. 0 HP / 0- Def Liepard: 313-370 (116.3 - 137.5%) -- guaranteed OHKO
• 252+ Atk Silk Scarf Arceus Extreme Speed vs. 252 HP / 0 Def Smeargle: 363-427 (115.6 - 135.9%) -- guaranteed OHKO

Hope I helped!