League Battle
From Inkipedia, the Splatoon wiki
League Battle is a multiplayer mode in Splatoon 2. It replaces Splatoon's Squad Battles as an option for co-operative ranked play. In a two hour period, players team up in a group of two or four and compete with other groups to earn as many points as possible. At the end of a two hour period, results will be shown in a ranking. [1]
Groups that rank high enough will recieve commemorative medals, either 
Gold Medals, 
Silver Medals, or 
Bronze Medals.
