Within the Battle Spot option of the PSS, which allows for random battles with other players, for both Free and Rating Battles there is a mode called Special Battles. Special Battles contain unique rulesets that change with each Battle season on the Pokémon Global Link and this page is to archive all of the rulesets introduced within Special Battle

Season 1

Battle Period: November 18th 2016 - January 16th 2017
Battle Type: Single Battle
Pokémon Restrictions: Alola Pokédex - Allows for Solgaleo, Lunala, Magearna & Ash-Greninja

The first season runs with a special Single Battle ruleset which will allow for the use of Solgaleo, Lunala, Magearna & Ash-Greninja, which can't be used in standard Rating Battles. No items are allowed

Season 2

Battle Period: January 17th 2017 - March 20th 2017
Battle type: Single Battle
Pokémon Restrictions: National Pokédex.
Banned Pokémon: Only 1 of the following can be used per team 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
The other standard rules apply, including all set to Level 50 if above that, and you choose 3 Pokémon out of your 6, and you cannot have two Pokémon holding the same hold item.

This is a special Battle ruleset where all Pokémon are usable, but you can only use one Legendary or Mythical Pokémon in your team. Pokémon transferred from all generations are allowed

Season 3

Battle Period: March 21st 2017 - May 15th 2017
Battle type: Single Battle
Pokémon Restrictions: National Pokédex.
Banned Pokémon: 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
Item Restrictions: All Pokémon have to hold Z-Crystals
The other standard rules apply, including all set to Level 50 if above that, and you choose 3 Pokémon out of your 6, and you cannot have two Pokémon holding the same hold item.

This is a special Battle ruleset where all Pokémon except the Legednary and Mythical Pokémon are restricted, but all Pokémon need to be holding Z-Crystals

 
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