League Battle

League Battle is a multiplayer mode in Splatoon 2. It replaces Squad Battles as an option for co-operative ranked play.

League Battles feature the same game modes as Ranked Battles, namely Splat Zones, Tower Control, Rainmaker, and Clam Blitz. The stages and modes for League Battles rotate every two hours and feature a different mode and stages. The stages selected for League Battles are not dependent on the stages in the monthly Ranked rotation.

League Battle has been confirmed to return in Splatoon 3 after a post-launch update. It'll presumably function the same as it did in Splatoon 2.

Overview
For two hours, players team up in a group of two, called a pair, or four, called a team, and compete with other groups to earn as many points as possible. At the end of the two hours, results are shown in a ranking system called League Power that acts the same as other power levels. Players get their initial League Power based on their performance in the first seven matches. Players must be Rank B- or higher in Ranked Battles to participate in League Battles. Unlike Squad Battles, a player's rank does not change, regardless of what rank they are.

Pairs are grouped up with other pairs, with two pairs on a team chosen at random. Teams of four play against other teams of four.

Each pair or team gets their own team ID - therefore, the League Power is mutual to all players in that group. Changing any members of the group results in a new team ID and a new League Power to calculate after seven matches.

Groups that get League Power have their power and possibly ranking displayed in Past Records and in SplatNet 2 fifteen minutes after the rotation ended. Up to four records can be displayed in Past Records. All rankings can be seen in the app, sorted by all regions, Japan, North America & AU/NZ, and Europe, as well as the player's highest League Power for pair and team.

Groups that rank high enough receive commemorative gold, silver, or bronze medals. These medals are awarded to the top 5%, 20%, and 50% of players for that rotation, respectively. The amount of medals obtained for each type in each mode (pair and team) can be seen in SplatNet 2.

Scheduled League rotation - League Rush
During the finals of the fourth Splatoon Koshien Tournament, there was an announcement of a scheduled League rotation.

Since February 2019, every month, there is a scheduled League Battle rotation announced on the @SplatoonJP Twitter for teams of four with set modes and stages. The top three teams, plus one additional team, receive a unique picture of their characters with their weapons and gear at one of the stages played. The criteria for the additional team cycles every month, alternating between the 101st team, the team with the median score overall, the highest scoring bronze team, and the 333rd team. All rewards are given based on the ranking for Japan. The pictures are posted on @SplatoonJP Twitter.