The Special Battle rules for Rating Battle Season 13 have been revealed by The Pokémon Company. Season 13 will run from November 6 through January 7 and runs on the original Pokémon Sun & Moon and Pokémon Ultra Sun & Ultra Moon, with rankings separate to each other. This ruleset only allows Legendary or Mythical Pokémon.
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 other standard rules apply, including all set to Level 50 if above that, and you choose 4 Pokémon out of your 6, and you cannot have two Pokémon holding the same hold item. Battles have a 10 minute duration, with turns having a 60 second timer.