The teams in the North American competition will be themed after Pokemon Red and Blue, no doubt in honor of the 20th anniversary of the first games’ release in Japan. Although the original Japanese games were actually Red Version and Green Version, Nintendo is using a “Red vs. Blue” theme for the North American region.

For the duration of the event, each player’s character will receive a snazzy Pokemon-themed t-shirt to show which side they’re on.

How does a Splatfest work, you ask? Well, a post about this event on the official Splatoon “Inkformation Center” news page elaborates on that:

Sounds fun, though interested Splatoon fans who’ve already made other plans for this weekend (such as, say, attending a convention) may be less than thrilled about the timing. But it will be interesting to see which version of the original Pokemon wins.