Battle Period: November 17th 2017 - January 23rd 2018
Battle Type: Single Battle
Pokémon Restrictions: Alola Pokédex

The first season runs with a special Single Battle ruleset which will allow for the use of the brand new Alola Pokédex

Battle Period: January 24th 2018 - March 15th 2018
Battle type: Single Battle
Pokémon Restrictions: National Pokédex. No more than 1 of Mewtwo, Mew, Lugia, Ho-Oh, Celebi, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Dialga, Palkia, Giratina, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Reshiram, Zekrom, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma, Magearna, and Marshadow.

The second season runs with a special Single Battle ruleset which will allow for the use of the brand new National Pokédex and 1 Legendary or Mythical Pokémon

Battle Period: March 16th 2018 - May 14th 2018
Battle type: Double Battle
Pokémon Restrictions: National Pokédex. No Mewtwo, Mew, Lugia, Ho-Oh, Celebi, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Dialga, Palkia, Giratina, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Reshiram, Zekrom, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma, Magearna, and Marshadow.
Item Restrictions: No Z-Crystals, Mega Stones or Eviolite

The third season runs with a special Single Battle ruleset which will allow for the use of the National Pokédex with a twist of only allowing you to pick 2 of your 6 Pokémon in battle

Battle Period: May 15th 2018 - July 10th 2018
Battle type: Double Battle - Inverse Battles
Pokémon Restrictions: National Pokédex. No Mewtwo, Mew, Lugia, Ho-Oh, Celebi, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Dialga, Palkia, Giratina, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Reshiram, Zekrom, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma, Magearna, and Marshadow.

The fourth season runs with a special Double Battle ruleset which will allow for the use of the National Pokédex with a twist of running the Inverse Battle type chart

Battle Period: July 11th 2018 - September 3rd 2018
Battle type: Single Battle
Pokémon Restrictions: National Pokédex. No Mewtwo, Lugia, Ho-Oh, Kyogre, Groudon, Rayquaza, Dialga, Palkia, Giratina, Arceus, Reshiram, Zekrom, Kyurem, Xerneas, Yveltal, Solgaleo, Lunala, Dusk Mane Necrozma, and Dawn Wings Necrozma cannot be used..

The eleventh season runs with a special Single Battle ruleset that allows for the use of Mythical Pokémon

Battle Period: September 4th 2018 - November 6th 2018
Battle type: Single Battle
Pokémon Restrictions: National Pokédex. Articuno, Zapdos, Moltres, Mewtwo, Mew, Raikou, Entei, Suicune, Lugia, Ho-Oh, Celebi, Regirock, Regice, Registeel, Latias, Latios, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Uxie, Mesprit, Azelf, Dialga, Palkia, Heatran, Regigigas, Giratina, Cresselia, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Cobalion, Terrakion, Virizion, Tornadus, Thundurus, Reshiram, Zekrom, Landorus, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Type: Null, Silvally, Tapu Koko, Tapu Lele, Tapu Bulu, Tapu Fini, Cosmog, Cosmoem, Solgaleo, Lunala, Nihilego, Buzzwole, Pheromosa, Xurkitree, Celesteela, Kartana, Guzzlord, Necrozma, Magearna, Marshadow, Poipole, Naganadel, Stakataka, Blacephalon, Zeraora, and Ash-Greninja cannot be used.
Banned Items: Mega Stones

The twelfth season runs with a special Single Battle ruleset. This ruleset bans usage of any Sub-Legenday (including Ultra Beasts), Legendary and Mythical Pokémon. It also blocks the use of Mega Stones

Battle Period: November 6th 2018 - January 8th 2019
Battle type: Double Battle
Pokémon Restrictions: Articuno, Zapdos, Moltres, Mewtwo, Mew, Raikou, Entei, Suicune, Lugia, Ho-Oh, Celebi, Regirock, Regice, Registeel, Latias, Latios, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Uxie, Mesprit, Azelf, Dialga, Palkia, Heatran, Regigigas, Giratina, Cresselia, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Cobalion, Terrakion, Virizion, Tornadus, Thundurus, Reshiram, Zekrom, Landorus, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Type: Null, Silvally, Tapu Koko, Tapu Lele, Tapu Bulu, Tapu Fini, Cosmog, Cosmoem, Solgaleo, Lunala, Nihilego, Buzzwole, Pheromosa, Xurkitree, Celesteela, Kartana, Guzzlord, Necrozma, Magearna, Marshadow, Poipole, Naganadel, Stakataka, Blacephalon, and Zeraora only

The thirteenth season runs with a special Double Battle ruleset. This ruleset only allows Legendary (including Ultra Beasts) or Mythical Pokémon

Battle Period: January 8th 2019 - April 2nd 2019
Battle type: Single Battle
Pokémon Restrictions: Pokémon Restrictions: Mewtwo, Mew, Lugia, Ho-Oh, Celebi, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Dialga, Palkia, Giratina, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Reshiram, Zekrom, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma, Magearna, Marshadow, Zeraora, and Ash-Greninja may not be used.
Item Restrictions: Berries only

The fourteenth season runs with a special Single Battle ruleset. This ruleset only allows Pokémon to hold Berries

Battle Period: April 2nd 2019 - June 17th 2019
Battle type: Single Battle
Pokémon Restrictions: Only Clefairy, Clefable, Mankey, Primeape, Poliwhirl, Poliwrath, Abra, Kadabra, Alakazam, Machop, Machoke, Machamp, Geodude, Graveler, Golem, Gengar, Drowzee, Hypno, Hitmonlee, Hitmonchan, Chansey, Mr. Mime, Jynx, Electabuzz, Magmar, Snorlax, Mew, Cleffa, Togepi, Togetic, Politoed, Aipom, Snubbull, Granbull, Teddiursa, Ursaring, Smeargle, Smoochum, Miltank, Blissey, Celebi, Ludicolo, Makuhita, Hariyama, Sableye, Meditite, Medicham, Plusle, Minun, Volbeat, Illumise, Spinda, Kecleon, Banette, Jirachi, Ambipom, Happiny, Munchlax, Electivire, Magmortar, Togekiss. Attack Restrictions: Metronome only Item Restrictions: No Mega Stones

The fifteenth season runs with a special Single Battle ruleset. This ruleset only allows Pokémon that know Metronome

Battle Period: June 18th 2019 - September 3rd 2019
Battle type: Single Battle
Pokémon Restrictions: No Venusaur, Charizard, Cloyster, Gengar, Kangaskhan, Gyarados, Snorlax, Zapdos, Dragonite, Azumarill, Scizor, Skarmory, Porygon2, Tyranitar, Blaziken, Breloom, Mawile, Salamence, Metagross, Garchomp, Lucario, Hippowdon, Gliscor, Mamoswine, Rotom, Heatran, Serperior, Excadrill, Ferrothorn, Hydreigon, Volcarona, Thundurus, Landorus, Greninja, Aegislash, Toxapex, Mimikyu, Tapu Koko, Tapu Lele, Tapu Fini, Celesteela, Kartana, and Naganadel or Mewtwo, Mew, Lugia, Ho-Oh, Celebi, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Dialga, Palkia, Giratina, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Reshiram, Zekrom, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma, Magearna, Marshadow, Zeraora, and Ash-Greninja.

The sixteenth season runs with a special Single Battle ruleset. This ruleset only allows Pokémon haven't ranked in top 30 during Seasons 7 to 15 in Single Battles

Battle Period: September 3rd 2019 - November 25th 2019
Battle type: Single Battle
Pokémon Restrictions: No Mewtwo, Mew, Lugia, Ho-Oh, Celebi, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys, Dialga, Palkia, Giratina, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Reshiram, Zekrom, Kyurem, Keldeo, Meloetta, Genesect, Xerneas, Yveltal, Zygarde, Diancie, Hoopa, Volcanion, Cosmog, Cosmoem, Solgaleo, Lunala, Necrozma, Magearna, Marshadow, Zeraora, and Ash-Greninja.
Banned Moves: Sonic Boom, Dragon Rage

The seventeenth season runs with a special Single Battle ruleset. This ruleset bans Pokémon over Level 1 and fixed damage moves