Munchlax

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 Soft stuff

77+ items

Squishy clayFluffStraw stoolBerry chairSimple cushionPlain stoolResort stoolStylish stoolSoft seatBox SofaPlain chairResort chairChic chairFancy chairAntique chairOffice chairCute chairPop art chairGaming chairPlain sofaResort sofaChic sofaAntique sofaLuxury sofaCute sofaPop art sofaPikachu sofaLog BedMini plain bedResort bedIron bedBeach chairStraw bedPop art bedPoké Ball bedBerry bedWooden BedPlain bedResort hammockGuest-room bedAntique bedIndustrial bedLuxury bedCute bedGaming bedNaptime bedTowel rackKnitting suppliesEevee dollPikachu dollClefairy dollDragonite dollDitto dollSubstitute dollTire toyInflatable boatSoft SandLight ClayCotton SporesFlower cushionFlowery table settingFlower garlandFlower backpackCamping chairSleeping bagAdventure kitStarry-sky bedSeashell seatOrnate chairMarine sofaOrnate bedCushion bedRunning shoesStarmie dollSand bedSwim ringBig swim ring

2 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

3 Looks like food

26+ items

Berry caseBerry tableBerry chairBerry bedTable settingPizzaFried potatoesSoda floatAfternoon tea setChocolate cookiesSandwichesShaved iceRibbon cakeBerry basketBerry clockBerry wall decorationBerry table lampBerry hanging lampBerry print (wallpaper)LeftoversRoom ServiceBerry printLunch boxJuice trioTeaware setWall plant

4 Wobbly stuff

20+ items

Folding chairResort hammockKnitting suppliesBalloonsPunching gameWobbuffet WobblerHanging bannerBerry wall decorationPunching bagBellFishing rodSilk ScarfLagging TailInflatable SudowoodoMoon clockMetronomeChimecho wind chimeHanging signChain lampBeach volleyball set

5 Group activities

Flavour: dry

8 foods

Chesto BerryWheatCave mushroomsCrushed-berry saladMushroom soupMushroom hamburger steakRoserade TeaSea grape 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.