The best passives for Shroomer Noct depend on the job you give it. Shroomer Noct is Paldeck #118, a Grass / Dark Pal with Planting 3, Handiwork 3, Gathering 3, Lumbering 2 — the sets below are the community-consensus best-in-slot for each role it can fill.

LegendDemon GodMuscleheadSpirit Emperor
Legend, Demon God and Musclehead stack raw attack; Spirit Emperor adds 20% Grass damage on top.
ArtisanSeriousLuckyWork Slave
Maximum work speed. Work Slave trades attack a base worker never uses; swap for Nocturnal on day-sleepers if sanity drops.
SwiftRunnerNimbleLegend
Every movement-speed passive stacks; Legend adds 15% more plus combat stats.
A perfect Shroomer Noct also wants 100/100/100 IVs (breeding averages the parents with a bonus, so high-IV Shroomer Noct parents compound) and 4-star condensation — feeding it spare copies raises this Grass / Dark Pal's stats and every work suitability a full level. Craft-speed and attack souls from the Statue of Power stack on top. The planner routes these passives from pals you own; see how to breed Shroomer Noct for parent combos.
Breed this Shroomer Noct build from your save →