What is the name of the first Splatfest in North America?

The first Splatfest in North America was Cats vs. Dogs.

The event was held in the original Splatoon on the Wii U, asking players to choose between two familiar household pets. Participants represented their choice in special Turf War matches, with the result determined from the community’s participation and performance. The theme helped establish Splatfests as one of Splatoon’s defining social features.

Splatfests differ from ordinary Turf War because players first pledge allegiance to a theme-based team, then play matches during a limited event period. The in-game news presenters announce the theme and later reveal the winning side. Regional Splatfests could use different themes, so the first event in North America was not necessarily the first Splatfest held worldwide.

Cats vs. Dogs is often confused with later crossover or celebrity-themed events. SpongeBob vs. Patrick, for example, belongs to a different promotional Splatfest tradition, while Pirates vs. Ninjas and Rock vs. Pop are not the first North American Splatoon Splatfest.