Add item validation on Pokemon ruleset
Add item validation on Pokemon ruleset

Add item validation on Pokemon ruleset to validate non standard items, such as unreleased items in previous gens or mod items.
sama2/Lumen-Pokemon-Showdown,Flareninja/Showdown-Boilerplate,Hidden-Mia/Roleplay-PS,javi501/Lumen-Pokemon-Showdown,JellalTheMage/PS-,Irraquated/Pokemon-Showdown,zczd/enculer,miahjennatills/Pokemon-Showdown,BadSteel/Omega-Pokemon-Showdown,TheManwithskills/serenity,Neosweiss/Pokemon-Showdown,EmmaKitty/Pokemon-Showdown,Articuno-I/Pokemon-Showdown,TheFenderStory/Pokemon-Showdown,Pokemon-Devs/Pokemon-Showdown,Flareninja/Pokemon-Showdown-1,jd4564/Pokemon-Showdown,Kenny-/Pokemon-Showdown,CrestfallPS/Pokemon-Showdown,TheManwithskills/serenity,sirDonovan/Pokemon-Showdown,JellalTheMage/PS-,sama2/Viridian-Pokemon-Showdown,SilverTactic/Pokemon-Showdown,VoltStorm/Server-pokemon-showdown,panpawn/Pokemon-Showdown,JennyPRO/Jenny,xCrystal/Pokemon-Showdown,TheManwithskills/Dusk--Showdown,comedianchameleon/servertest1,MasterFloat/LQP-Server-Showdown,Wando94/Spite,AbsolitoSweep/Absol-server,k3naan/Pokemon-Showdown,Enigami/Pokemon-Showdown,TogeSR/Lumen-Pokemon-Showdown,sirDonovan/Pokemon-Showdown,hayleysworld/serenity,abulechu/Lumen-Pokemon-Showdown,MayukhKundu/Mudkip-Server,Sora-League/Sora,Psyientist/Showdown-Boilerplate,xfix/Pokemon-Showdown,AustinXII/Pokemon-Showdown,abrulochp/Dropp-Pokemon-Showdown,Legit99/Lightning-Storm-Server,Gold-Solox/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,Ecuacion/Lumen-Pokemon-Showdown,MasterFloat/LQP-Server-Showdown,xfix/Pokemon-Showdown,yashagl/yash-showdown,JellalTheMage/Jellals-Server,Legit99/Lightning-Storm-Server,Irraquated/Showdown-Boilerplate,SerperiorBae/PokemonShowdown2,azum4roll/Pokemon-Showdown,NoahVSGamingYT/Pokemon-Showdown,panpawn/Gold-Server,Alpha-Devs/Alpha-Server,Fusxfaranto/Pokemon-Showdown,xCrystal/Pokemon-Showdown,sama2/Universe-Pokemon-Showdown,lFernanl/Lumen-Pokemon-Showdown,Tesarand/Pokemon-Showdown,FakeSloth/Infinite,SilverTactic/Dragotica-Pokemon-Showdown,k3naan/Pokemon-Showdown,Ecuacion/Lumen-Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,Pikachuun/Pokemon-Showdown-SMCMDM,Vacate/Pokemon-Showdown,gustavo515/gashoro,SerperiorBae/Bae-Showdown-2,Flareninja/Hispano-Pokemon-Showdown,CorruptedHelix/Pokemon-Showdown,SerperiorBae/Bae-Showdown-2,theodelhay/test,svivian/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,Lauc1an/Perulink-Showdown,Volcos/SpacialGaze,Neosweiss/Pokemon-Showdown,megaslowbro1/Pokemon-Showdown,yashagl/pokecommunity,TheManwithskills/COC,lFernanl/Zero-Pokemon-Showdown,SolarisFox/Pokemon-Showdown,urkerab/Pokemon-Showdown,HoeenCoder/SpacialGaze,brettjbush/Pokemon-Showdown,Flareninja/Hispano-Pokemon-Showdown,DarkSuicune/Kakuja-2.0,Stroke123/POKEMON,Disaster-Area/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,ZeroParadox/BlastBurners,SubZeroo99/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,DesoGit/TsunamiPS,Kill-The-Noise/BlakJack-Boilerplate,AWailOfATail/Pokemon-Showdown,Pikachuun/Joimmon-Showdown,gustavo515/batata,sama2/Lumen-Pokemon-Showdown,psnsVGC/Wish-Server,Mystifi/Exiled,Breakfastqueen/advanced,KewlStatics/Showdown-Template,MayukhKundu/Technogear,MeliodasBH/boarhat,Vacate/Pokemon-Showdown,DalleTest/Pokemon-Showdown,sama2/Dropp-Pokemon-Showdown,PauLucario/LQP-Server-Showdown,Zarel/Pokemon-Showdown,sama2/Universe-Pokemon-Showdown,KewlStatics/Pokeindia-Codes,MayukhKundu/Technogear-Final,svivian/Pokemon-Showdown,LustyAsh/EOS-Master,kubetz/Pokemon-Showdown,TheManwithskills/Server-2,panpawn/Gold-Server,Zipzapadam/Server,megaslowbro1/Showdown-Server-again,MasterFloat/Pokemon-Showdown,Enigami/Pokemon-Showdown,TheManwithskills/Server-2,Yggdrasil-League/Yggdrasil,KewlStatics/Shit,Lord-Haji/SpacialGaze,KewlStatics/Pokeindia-Codes,Firestatics/Firestatics46,Darkshadow6/PokeMoon-Creation,hayleysworld/Pokemon-Showdown,Pikachuun/Touhoumon-Showdown,UniversalMan12/Universe-Server,abulechu/Dropp-Pokemon-Showdown,AWailOfATail/awoat,TheManwithskills/Dusk--Showdown,TheManwithskills/Server-2,MeliodasBH/Articuno-Land,Darkshadow6/git-remote-add-scalingo-git-scalingo.com-pokemoonforums,Ransei1/Alt,AvinashSwaminathan/Pokelegends,ehk12/bigbangtempclone,Syurra/Pokemon-Showdown,abrulochp/Dropp-Pokemon-Showdown,iFaZe/SliverX,Flareninja/Pokemon-Showdown-1,scotchkorean27/Pokemon-Showdown,Irraquated/Pokemon-Showdown,kotarou3/Krister-Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,Adithya4Uberz/The-Tsunami-League,Wando94/Spite,scotchkorean27/Pokemon-Showdown,gustavo515/gashoro,LustyAsh/EOS-Master,Ridukuo/Test,DesoGit/Tsunami_PS,Pokemon-Devs/Pokemon-Showdown,JennyPRO/Jenny,QuiteQuiet/Pokemon-Showdown,Extradeath/advanced,ZestOfLife/PSserver,MasterFloat/Pokemon-Showdown,DB898/theregalias,QuiteQuiet/Pokemon-Showdown,Checkinator/Pokemon-Showdown,Ridukuo/Test,ehk12/coregit,NoahVSGamingYT/Pokemon-Showdown,yashagl/pokemon,BuzzyOG/Pokemon-Showdown,Ransei1/Alt,TheManwithskills/Creature-phil-boiler,SerperiorBae/Pokemon-Showdown-1,hayleysworld/harmonia,Sora-League/Sora,brettjbush/Pokemon-Showdown,gustavo515/test,Sora-Server/Sora,Celecitia/Plux-Pokemon-Showdown,ScottehMax/Pokemon-Showdown,Alpha-Devs/Alpha-Server,hayleysworld/asdfasdf,SerperiorBae/PokemonShowdown2,BasedGod7/PH,KewlStatics/Alliance,comedianchameleon/servertest1,Firestatics/omega,LightningStormServer/Lightning-Storm,Irraquated/EOS-Master,Oiawesome/DPPtServ2,Pablo000/aaa,Breakfastqueen/advanced,Thiediev/Pokemon-Showdown,DesoGit/Tsunami_PS,Kokonoe-san/Glacia-PS,Darkshadow6/PokeMoon-Creation,TheManwithskills/Server---Thermal,ehk12/bigbangtempclone,arkanox/MistShowdown,Evil-kun/Pokemon-Showdown,TheManwithskills/New-boiler-test,Chespin14/Custom-Platform-Pokemon-Showdown,Adithya4Uberz/The-Tsunami-League,SerperiorBae/Bae-Showdown-2,Atwar/http-server-femalehq.rhcloud.com-80.psim.us-,AvinashSwaminathan/lotus,TheManwithskills/New-boiler-test,Tesarand/Pokemon-Showdown,TheFenderStory/Pokemon-Showdown,SerperiorBae/BaeShowdown,Kill-The-Noise/BlakJack-Boilerplate,AnaRitaTorres/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,danpantry/Pokemon-Showdown,DalleTest/Pokemon-Showdown,Zarel/Pokemon-Showdown,Nineage/Showdown-Boilerplate,ZestOfLife/FestiveLife,KewlStatics/Shit,SerperiorBae/BaeShowdown,aakashrajput/Pokemon-Showdown,Elveman/RPCShowdownServer,Firestatics/Omega-Alpha,CreaturePhil/Pokemon-Showdown,MayukhKundu/Flame-Savior,TheDiabolicGift/Lumen-Pokemon-Showdown,TheFenderStory/Showdown-Boilerplate,SolarisFox/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,Wando94/Pokemon-Showdown,TheDiabolicGift/Showdown-Boilerplate,PrimalGallade45/Dropp-Pokemon-Showdown,EmmaKitty/Pokemon-Showdown,theodelhay/test,Flareninja/Sora,PS-Spectral/Spectral,KaitoV4X/Showdown,kuroscafe/Paradox,lFernanl/Mudkip-Server,Sora-Server/Sora,AustinXII/Pokemon-Showdown,Tesarand/Pokemon-Showdown,MeliodasBH/boarhat,ehk12/clone,cadaeic/Pokemon-Showdown,hayleysworld/Showdown-Boilerplate,AvinashSwaminathan/lotus-v2,ZestOfLife/PSserver,yashagl/yash-showdown,HoeenCoder/SpacialGaze,asdfghjklohhnhn/Pokemon-Showdown,SilverTactic/Dragotica-Pokemon-Showdown,PS-Spectral/Spectral,HoeenKid/Pokemon-Showdown-Johto,superman8900/Pokemon-Showdown,TogeSR/Lumen-Pokemon-Showdown,Mystifi/Exiled,Kevinxzllz/PS-Openshift-Server,Legendaryhades/Oblivion,jumbowhales/Pokemon-Showdown,Darkshadow6/git-remote-add-scalingo-git-scalingo.com-pokemoonforums,zczd/enculer,jd4564/Pokemon-Showdown,TheDiabolicGift/Lumen-Pokemon-Showdown,sama2/Dropp-Pokemon-Showdown,Firestatics/Firestatics46,CorruptedHelix/Pokemon-Showdown,kotarou3/Krister-Pokemon-Showdown,AustinXII/Pokemon-Showdown,Sora-League/Sora,anubhabsen/Pokemon-Showdown,abulechu/Dropp-Pokemon-Showdown,Flareninja/Sora,danpantry/Pokemon-Showdown,PauLucario/LQP-Server-Showdown,piiiikachuuu/Pokemon-Showdown,zek7rom/SpacialGaze,Articuno-I/Pokemon-Showdown,CreaturePhil/Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,ShowdownHelper/Saffron,abrulochp/Lumen-Pokemon-Showdown,Oiawesome/DPPtServ2,cadaeic/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,SubZeroo99/Pokemon-Showdown,Adithya4Uberz/KTN,CreaturePhil/Showdown-Boilerplate,BlazingAura/Showdown-Boilerplate,PrimalGallade45/Lumen-Pokemon-Showdown,FakeSloth/wulu,Guernouille/Pokemon-Showdown,Lord-Haji/SpacialGaze,hayleysworld/asdfasdf,MayukhKundu/Technogear,BlakJack/Kill-The-Noise,Firestatics/omega,piiiikachuuu/Pokemon-Showdown,AbsolitoSweep/Absol-server,Ecuacion/Pokemon-Showdown,Hidden-Mia/Roleplay-PS,yashagl/pokemon-showdown,ehk12/clone,svivian/Pokemon-Showdown,ShowdownHelper/Saffron,asdfghjklohhnhn/Pokemon-Showdown,KewlStatics/Showdown-Template,BadSteel/Pokemon-Showdown,TheManwithskills/Server,AWailOfATail/Pokemon-Showdown,Raina4uberz/Light-server,javi501/Lumen-Pokemon-Showdown,Irraquated/Pokemon-Showdown,iFaZe/SilverZ,megaslowbro1/Showdown-Server-again,azum4roll/Pokemon-Showdown,SkyeTheFemaleSylveon/Pokemon-Showdown,hayleysworld/Pokemon-Showdown,MayukhKundu/Flame-Savior,SerperiorBae/Pokemon-Showdown,Flareninja/Pokemon-Showdown,SSJGVegito007/Vegito-s-Server,TheDiabolicGift/Showdown-Boilerplate,panpawn/Gold-Server,Hopenub/Pokemon-Showdown,InvalidDN/Pokemon-Showdown,lFernanl/Pokemon-Showdown,Flareninja/Showdown-Boilerplate,UniversalMan12/Universe-Server,Pablo000/aaa,InvalidDN/Pokemon-Showdown,yashagl/pokemon-showdown,Git-Worm/City-PS,RustServer/Pokemon-Showdown,Git-Worm/City-PS,ankailou/Pokemon-Showdown,SerperiorBae/Pokemon-Showdown,TheManwithskills/Creature-phil-boiler,SerperiorBae/Pokemon-Showdown-1,ZeroParadox/ugh,HoeenCoder/SpacialGaze,DarkSuicune/Kakuja-2.0,xfix/Pokemon-Showdown,kuroscafe/Paradox,Extradeath/psserver,yashagl/pokemon,Darkshadow6/PokeMoon-Creation,comedianchameleon/test,KewlStatics/Alliance,Lord-Haji/SpacialGaze,DesoGit/TsunamiPS,ehk12/coregit,Kill-The-Noise/BlakJack-Boilerplate,catanatron/pokemon-rebalance,Elveman/RPCShowdownServer,PS-Spectral/Spectral,SerperiorBae/Pokemon-Showdown-1,Parukia/Pokemon-Showdown,lFernanl/Pokemon-Showdown,hayleysworld/harmonia,forbiddennightmare/Pokemon-Showdown-1,megaslowbro1/Pokemon-Showdown-Server-for-megaslowbro1,MeliodasBH/Articuno-Land,kubetz/Pokemon-Showdown,LightningStormServer/Lightning-Storm,ScottehMax/Pokemon-Showdown,Ridukuo/Test2,Atwar/ServerClassroom,BuzzyOG/Pokemon-Showdown,lAlejandro22/lolipoop,lFernanl/Zero-Pokemon-Showdown,Ecuacion/Pokemon-Showdown,RustServer/Pokemon-Showdown,urkerab/Pokemon-Showdown,abrulochp/Lumen-Pokemon-Showdown,Lauc1an/Perulink-Showdown,comedianchameleon/test,QuiteQuiet/Pokemon-Showdown,Kevinxzllz/PS-Openshift-Server,anubhabsen/Pokemon-Showdown,SkyeTheFemaleSylveon/Mudkip-Server,FakeSloth/Infinite,Werfin96/Ultimate,Bryan-0/Pokemon-Showdown,kuroscafe/Showdown-Boilerplate,CharizardtheFireMage/Showdown-Boilerplate,megaslowbro1/Pokemon-Showdown-Server-for-megaslowbro1,zek7rom/SpacialGaze,Nineage/Origin,ZeroParadox/BlastBurners,SerperiorBae/Pokemon-Showdown,hayleysworld/serenityserver,johtooo/PS,TheManwithskills/DS,ankailou/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,Zarel/Pokemon-Showdown,TbirdClanWish/Pokemon-Showdown,SerperiorBae/Bae-Showdown,Arcticblast/Pokemon-Showdown,Pikachuun/Joimmon-Showdown,SilverTactic/Showdown-Boilerplate,gustavo515/final,SkyeTheFemaleSylveon/Pokemon-Showdown,Wando94/Pokemon-Showdown,yashagl/pokecommunity,hayleysworld/serenityc9,Raina4uberz/Light-server,Stroke123/POKEMON,MayukhKundu/Technogear-Final,JellalTheMage/Jellals-Server,abulechu/Lumen-Pokemon-Showdown,Extradeath/psserver,AWailOfATail/Pokemon-Showdown,Alpha-Devs/OmegaRuby-Server,PrimalGallade45/Dropp-Pokemon-Showdown,forbiddennightmare/Pokemon-Showdown-1,Irraquated/Showdown-Boilerplate,jumbowhales/Pokemon-Showdown,lFernanl/Lumen-Pokemon-Showdown,Firestatics/Omega-Alpha,SilverTactic/Showdown-Boilerplate,svivian/Pokemon-Showdown,johtooo/PS,Syurra/Pokemon-Showdown,lFernanl/Mudkip-Server,Johto-Serverr/Werfin-Boilerplate,Kokonoe-san/Glacia-PS,megaslowbro1/Pokemon-Showdown,Parukia/Pokemon-Showdown,Luobata/Pokemon-Showdown,UniversalMan12/Universe-Server,xfix/Pokemon-Showdown,DB898/theregalias,Pikachuun/Pokemon-Showdown-SMCMDM,SerperiorBae/BaeShowdown,BuzzyOG/Pokemon-Showdown,svivian/Pokemon-Showdown,TheManwithskills/COC,Irraquated/EOS-Master,LightningStormServer/Lightning-Storm,TheManwithskills/Server,hayleysworld/serenity,hayleysworld/serenityc9,Flareninja/Lumen-Pokemon-Showdown,TheFenderStory/Showdown-Boilerplate,bai2/Dropp,BlazingAura/Showdown-Boilerplate,arkanox/MistShowdown,xfix/Pokemon-Showdown,Atwar/http-server-femalehq.rhcloud.com-80.psim.us-,SerperiorBae/Bae-Showdown,SSJGVegito007/Vegito-s-Server,TheManwithskills/DS,ZestOfLife/FestiveLife,Breakfastqueen/advanced,Yggdrasil-League/Yggdrasil,kupochu/Pokemon-Showdown,Nineage/Origin,TheManwithskills/Server---Thermal,LegendBorned/PS-Boilerplate,comedianchameleon/test,Alpha-Devs/OmegaRuby-Server,gustavo515/test,lAlejandro22/lolipoop,MayukhKundu/Pokemon-Domain,CharizardtheFireMage/Showdown-Boilerplate,Zipzapadam/Server,Checkinator/Pokemon-Showdown,PrimalGallade45/Lumen-Pokemon-Showdown,MayukhKundu/Mudkip-Server,LegendBorned/PS-Boilerplate,hayleysworld/Showdown-Boilerplate,Psyientist/Showdown-Boilerplate,Sora-Server/Sora,AWailOfATail/awoat,Enigami/Pokemon-Showdown,MayukhKundu/Pokemon-Domain,Volcos/SpacialGaze,Ridukuo/Test2,SkyeTheFemaleSylveon/Mudkip-Server,ZeroParadox/ugh,kupochu/Pokemon-Showdown,hayleysworld/serenityserver,Atwar/ServerClassroom,SilverTactic/Pokemon-Showdown,Disaster-Area/Pokemon-Showdown,Flareninja/Pokemon-Showdown,Flareninja/Sora,miahjennatills/Pokemon-Showdown,Evil-kun/Pokemon-Showdown,sama2/Viridian-Pokemon-Showdown,Darkshadow6/git-remote-add-scalingo-git-scalingo.com-pokemoonforums,kuroscafe/Showdown-Boilerplate,ShowdownHelper/Saffron,Bryan-0/Pokemon-Showdown,catanatron/pokemon-rebalance,gustavo515/batata,KaitoV4X/Showdown,bai2/Dropp,xCrystal/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,Celecitia/Plux-Pokemon-Showdown,Mystifi/Exiled,TbirdClanWish/Pokemon-Showdown,Gold-Solox/Pokemon-Showdown,panpawn/Pokemon-Showdown,Atwar/server-epilogueleague.rhcloud.com,psnsVGC/Wish-Server,SerperiorBae/Bae-Showdown,AvinashSwaminathan/lotus-v3,Flareninja/Lumen-Pokemon-Showdown,gustavo515/final,Parukia/Pokemon-Showdown,Guernouille/Pokemon-Showdown,Enigami/Pokemon-Showdown,DesoGit/Tsunami_PS,Atwar/server-epilogueleague.rhcloud.com,superman8900/Pokemon-Showdown,HoeenCoder/SpacialGaze,urkerab/Pokemon-Showdown,Extradeath/advanced