Vikavolt

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 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

2 Electronics

89+ items

Gaming fridgeGaming chairGaming bedMicrowave ovenRefrigeratorFanAir conditionerPrinterWashing machineToiletTabletCell phoneLaptopComputerGaming PCTelevisionWall monitorArcade machineGame Boy systemHumidifierJumbled cordsCD playerTabletop micStanding micCool electric guitarCool bass guitarAudio mixerSpeakerPunching gameControl unitCeiling fanRaichu signLarge ventilation fanUtility poleWireless power-transmitter switchWireless power transmitterMini generatorFloor switchWall switchCard readerLaser sensorSecurity cameraTown streetlightHarbor streetlightChic streetlightDouble streetlightMushroom lampPlain lampDesk lightPoké Ball lightBerry table lampCute lampPoké Ball lampModel planetRed meteor lampOrange meteor lampYellow meteor lampGreen meteor lampBlue meteor lampIndigo meteor lampViolet meteor lampLuxury lampGarden lightLanternSeedot LampMirror ballWall lightShell lampFluorescent lightGaming lightResort lightString lightsPop art lampBerry hanging lampSurface lightSpotlightAntique chandelierJirachi lampShop fridgeServersCycle shop signSupermarket signCafé signRestaurant signGift shop signBubble machineDangling streetlightChain lampFloating lantern

3 Exercise

5+ items

Punching gameWobbuffet WobblerPunching bagBikeBeach volleyball set

4 Glass stuff

97+ items

Sea glass fragmentsGlassGaming fridgeOffice shelfIron standWall mirrorLarge mirrorAntique dresserLuxury dresserCute dresserWiggly mirrorPhoto frameDining cabinetMicrowave ovenPrinterWashing machineTabletCell phoneLaptopComputerGaming PCTelevisionWall monitorArcade machineAlarm ClockGame Boy systemHumidifierCrystal ballMicroscopeScience experimentAudio mixerSpacesuitSpaceshipAntique clockBerry clockGrubby tabletGrubby cell phoneVending machineRaichu signMini generatorCard readerTown streetlightHarbor streetlightChic streetlightDouble streetlightPlain lampDesk lightPoké Ball lightBerry table lampCute lampPoké Ball lampRed meteor lampOrange meteor lampYellow meteor lampGreen meteor lampBlue meteor lampIndigo meteor lampViolet meteor lampLuxury lampGarden lightLanternSeedot LampMirror ballWall lightShell lampFluorescent lightGaming lightString lightsPop art lampBerry hanging lampSurface lightSpotlightAntique chandelierClear AmuletModern doorGlass windowWindow paneStained-glass window (upper)Stained-glass window (middle)Stained-glass window (lower)Sash windowWater pillar quarterJuice trioDigital cameraOil lanternStar-shaped DresserTelescopeStar wall decorationJirachi lampMarine dresserShop display caseShop fridgeBottled shipWall clockChimecho wind chimeBlenderChain lamp

5 Nice breezes

9+ items

FanAir conditionerPinwheelsTidal BellModel space shuttleCeiling fanWeather vaneLarge ventilation fanChimecho wind chime

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.