The Special Battle rules for Rating Battle Season 8 have been revealed. Season 8 will run from January 23 to March 12, 2018, for Pokémon Sun & Moon and Pokémon Ultra Sun & Ultra Moon, with rankings separate to each other. This rule set allows for use of all Pokémon within the new Alola Pokédex.
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 other standard rules apply, including all Pokémon set to Level 50 if above that, and you choose three Pokémon out of your six, and you cannot have two Pokémon holding the same hold item. Battles have a 10-minute duration, with turns having a 60-second timer.