Fix Sky Drop bug
Fix Sky Drop bug

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