Given that Quiver Dance is banned but not Victory Dance (+Atk, +Def and +Speed for those not in the know), since the only official user is Hisuian Lilligant, the other Grass / Fighting-type Pokémon still benefit a lot from gaining that move. Also of note is Breloom granting access to Technician for other Grass / Fighting Pokémon, boosting Trailblaze and Rock Tomb for all of them.

130 Attack backed up with Victory Dance allows it to tank non-Flying physical hits better and potentially outspeed anything that would otherwise outspeed Breeloom. It’s easy to see why only Spore got banned and not every sleep-inducing moves, as passing Spore to Virizion or Hisuian Lilligant would be nightmare, and a Breloom with boosted Speed would be pushed even further with Spore.

OG user of Victory Dance. Technician from Breloom boosts Bullet Seed, Grassy Glide and Triple Axel, but still doesn’t have much that threatens Fire-type threats.

Lowest Atk compared to others, but is slightly faster than Hisuian Lilligant and has a high Special Defense, so one shall play around Virizion with Victory Dance cautiously. Technician also allows Virizion to viably use Vacuum Wave, Mud Shot, Magical Leaf (for more PP than Energy Ball) and Air Cutter, though it might prefer to run physical thanks to…

Biggest beneficier by granting
Bulldoze / Earthquake, Spikes,
Bite / Knock Off, Spiky Shield, Iron Head, Taunt, Roar, and Reflect. (Italized means Technician) It also benefit Victory Dance the most amongst the slower Grass / Fighting thanks to having the highest Defense and is already a tier higher than the rest (RU vs Breloom’s NU), making Chesnaught one powerful set-up wallbreaker with either Scrappy, Technician or even Poison Heal.

It’s more of a giver than a fighter, granting Nasty Plot (for Virizion), Roost, Haze, Defog, U-Turn, Light Screen (so Chesnaught can set both it and Reflect with Poison Heal Ability), Dual Wingbeat (for opposing Grass-type), Sucker Punch, and especially Triple Arrows, but is not able to do anything it can do that others can’t do better.