Goomy

A habitat matching this ambience raises Comfy Level faster. Time and weather gate whether a Pokémon turns up at a habitat at all — though light overrides the clock: a night Pokémon spawns at any hour if its habitat sits somewhere dark such as a cave or underground, and a day Pokémon spawns at night if its habitat is ringed with light.

Give or place anything matching these and both friendship and Comfy Level rise much faster — a matching item lays down with a bigger sparkle. For a Pokémon with the Trade specialty, matching items are also worth 50% more on the scale.

1 Lots of water

30+ items

Resort hammockTable settingPaper Party cupsSoda floatShaved iceModern sinkToiletSinkBathtime setCleaning suppliesShowerBathtubBouncy blue bathtubHumidifierFunky diffuserWater basinCanoeInflatable boatBeach parasolHorsea fountainFire hydrantSprinklerMystic WaterWater pillar quarterHoppip water bottleJuice trioTeaware setBottled shipGyarados fountainBubble machine

2 Luxury

61+ items

Antique chestAntique closetPolygonal ShelfAntique tableChic tableLuxury tableChic chairFancy chairAntique chairLuxury chairGaming chairChic sofaAntique sofaLuxury sofaGuest-room bedAntique bedLuxury bedCute bedWall mirrorLarge mirrorAntique dresserLuxury dresserTable settingAfternoon tea setFancy penStone fireplaceDining cabinetBig NuggetAuspicious ArmorMalicious ArmorAntique clockSlender candleEerie candleFirepitChansey plantBellPoké Ball lightPoké Ball lampLuxury lampMirror ballAntique chandelierRainbow FeatherSilver FeatherJump rope trophyJewel wall decorationTreasureHide-and-sneak trophyOrnate standOrnate tableOrnate chairOrnate bedTeaware setDecorative platesOrnate decorative shelfSparkling jewelryMusic boxHarpParty ballGyarados fountainPrimarina statueLampion

3 Lots of nature

28+ items

Berry caseStraw tableLog tableGarden tableBerry tableBerry chairLog chairGarden chairGarden benchLog BedStraw bedBerry bedWooden BedBerry basketTall potted plantFlat-leaf plantTwisted potted plantBerry clockVine wall decorationBerry wall decorationBerry table lampSeedot LampBerry hanging lampBerry print (wallpaper)Miracle SeedSilver PowderBig RootBerry print

4 Cleanliness

14+ items

Waterproof seatLarge mirrorModern sinkWashing machineToiletSinkTowel rackBathtime setCleaning suppliesShowerBathtubBouncy blue bathtubWater basinCooler

5 Healing

4+ items

HumidifierFirst aid kitThroat SprayShop shelf

Flavour: sweet

10 foods

Pecha BerryBeanLeppa saladFluffy breadPotato hamburger steakMoomoo Milk CoffeeWatermelon sliceWatermelon smoothieWatermelon breadLeppa smoothie

Two caveats. The game lists these five in a fixed order, but no source says the first counts for more than the fifth — the numbers are the in-game order, not a strength ranking. And the item lists are incomplete: Serebii marks them as still being filled in, so each count is a floor, not a total.