Google Gemini Answer
Perior(Peroreimu)isaDarkness-typePokémonwith140HP.IthasaSingleStrikeabilitycalled
DreamEaterthatallowsittotakethedamagecountersoffofanopponent'sPokémonandaddthemontoitself,whichcanbeusefulforhealingPeriororforaddingdamagecounterstoanopponent'sPokémonthatisabouttobeknockedout.ItalsohasaSingleStrikeattackcalled
NightmareSongthatdeals100damageandpreventstheopponent'sPokémonfromusingitsAbilityduringitsnextturn,whichcanbeusefulforshuttingdownanopponent'sstrategy.
HerearesometipsforusingPerioreffectively:
HereisasampledeckthatyoucanusetoplayPerior:
ThisdeckisdesignedtotakeadvantageofPerior'sDreamEaterability.Dedenne-GXcanhelpyoudrawcardsquickly,whileEldegossVandCrobatVcanhelpyousearchforthecardsyouneed.DarkraiVcanhelpyoucontroltheopponent'shand,whileYveltalVMAXcandealmassivedamage.QuickBall,LevelBall,andDarkBallcanhelpyougetPeriorintoplayquickly,whileResetStampandMarniecanhelpyoudisrupttheopponent'sstrategy.Boss'sOrderscanhelpyoubringtheopponent'sstrongestPokémonintoplay,whileProfessor'sResearchandRaihancanhelpyoudrawcardsandfindthecardsyouneed.PeonycanhelpyousearchforyourDarknessEnergy,whileDarknessEnergyisnecessarytousePerior'sattacks.