Twin Squads.
☆ NintendObs Weekly – Monday, July 27, 2015 – Sunday, August 2, 2015.
When forming a two-person squad, you’ll be paired with two more players who’ve done the same, and face off against a team of two two-person squads. That’s a lot of twos! The other pair you and your opponents are matched with are random, but they should be a similar rank.
— Squid Research Lab
Source: Splatoon’s Tumblr.
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