Onix

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 Stone stuff

97+ items

StoneLuxury chairStone benchLuxury bedLuxury dresserMugTable settingSmall vaseLeafy plantPitcher-plant potExtravagant flowersTall potted plantFlat-leaf plantMunna bankPencil holderStone fireplaceDining cabinetToiletSinkBathtubGold TeethBig NuggetMysterious statueFiery Magby statueGym emblem statueSpacesuitModel space shuttleSpaceshipDecorative storage shelfCampfireSlender candleEerie candleWall torchFirepitConcrete pipeGarden ornamentGravestoneHorsea fountainSignpostInformation boardDitto FlagSprinklerModel planetLuxury lampShell lampStone tiling (wallpaper)Stone flooring (wallpaper)Stone brick wall (wallpaper)Light ClaySkull FossilArmor FossilJaw FossilSail FossilWing Fossil (head)Wing Fossil (right wing)Wing Fossil (left wing)Wing fossil (body)Wing Fossil (tail)Headbutt Fossil (head)Headbutt Fossil (body)Headbutt Fossil (tail)Shield Fossil (Head)Shield Fossil (body)Shield Fossil (tail)Despot Fossil (head)Despot Fossil (body)Despot Fossil (legs)Despot Fossil (tail)Tundra Fossil (head)Tundra Fossil (body)Tundra Fossil (tail)Stone brick wallStone pillar (upper)Stone pillar (middle)Stone pillar (lower)Stone flooringStone tilingStone stepsStone hipped roofStone roof valleyStone roof decorationStone debrisMetal DebrisJewel wall decorationTreasureMarine chestMarine closetOrnate standSeashell seatMarine chairOrnate chairOrnate bedDecorative platesParty ballGyarados fountainPrimarina statueStone sign

2 Lots of dirt

38+ items

Red paintBlue paintGreen paintYellow paintPink paintCyan paintWhite paintBlack paintSandboxPunching bagSandbagsWheelbarrowSkull FossilArmor FossilJaw FossilSail FossilWing Fossil (head)Wing Fossil (right wing)Wing Fossil (left wing)Wing fossil (body)Wing Fossil (tail)Headbutt Fossil (head)Headbutt Fossil (body)Headbutt Fossil (tail)Shield Fossil (Head)Shield Fossil (body)Shield Fossil (tail)Despot Fossil (head)Despot Fossil (body)Despot Fossil (legs)Despot Fossil (tail)Tundra Fossil (head)Tundra Fossil (body)Tundra Fossil (tail)MudRunning shoesSand bedBeach volleyball set

3 Blocky stuff

100+ items

PaperWall storage boxPlain chestOffice cabinetAntique chestPlain closetOffice lockerAntique closetOffice shelfPlain standIron standWooden stoolIron chairPublic seatSoft seatBox SofaLog BedMini plain bedWall mirrorLarge mirrorPicnic basketSandwichesBerry basketLetterNotepadBookOpen BookPapersNewspaperPhoto frameWall photo frameCorkboardMini bookcaseBookcaseStone fireplaceModern sinkCooking stoveMicrowave ovenRefrigeratorWashing machineSinkTabletCell phoneLaptopTelevisionWall monitorArcade machineGame Boy systemSpeakerBoo-in-the-boxCardboard boxesWhiteboardControl unitWall CalendarHanging scrollGrubby letterGrubby notepadGrubby bookGrubby papersGrubby newspaperGrubby tabletGrubby cell phoneSandboxVending machineChansey plantInflatable boatMenu boardWorn wooden crateWooden crateLarge ventilation fanFrameMini generatorWall lightLoaded DiceTown mapTeam Rocket Wall HangingStar closetStarry-sky bedMarine chestMarine closetOrnate standBook stackShop display caseShop fridgeMusic boxToolboxServersDecorative shop shelfArrow sign (left)Arrow sign (right)Hanging signStone signSlim information boardCycle shop signSupermarket signCafé signRestaurant signGift shop signStanding frameCooler

4 Slender objects

49+ items

Vine ropeTwinePaper Party cupsSmall vaseTall potted plantFlat-leaf plantTwisted potted plantFancy penShowerDecorative plant shelfVine wall decorationSlender candleWooden birdhouseFishing rodIron pipesMushroom streetlightTown streetlightHarbor streetlightChic streetlightDouble streetlightDesk lightLuxury lampFluorescent lightBerry hanging lampDestiny KnotWing Fossil (right wing)Wing Fossil (left wing)Wing fossil (body)Wing Fossil (tail)Headbutt Fossil (body)Headbutt Fossil (tail)Shield Fossil (body)Shield Fossil (tail)Despot Fossil (body)Despot Fossil (legs)Despot Fossil (tail)Tundra Fossil (head)Tundra Fossil (body)Tundra Fossil (tail)WireMetal chainRopeBroken streetlightInflatable SudowoodoTelescopeChimecho wind chimeDangling streetlightPearl streetlightLampion

5 Exercise

5+ items

Punching gameWobbuffet WobblerPunching bagBikeBeach volleyball set

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.