Splatoon 3 beta debuts later this month in the form of Splatfest

The new Splatfest will take place between rock, paper, and scissors

Splatoon 3 - Inkipedia, the Splatoon wiki

Nintendo Announces Splatoon 3's First Post-Launch Splatfest - GameSpot

Splatoon 3 Will Get a Splatfest-Only Demo This Month - IGN

Splatoon 3, OT, The Splatening

Splatoon 3 Preview - Everything We Learned About Maps, Modes, and Splatfests From The Nintendo Direct - Game Informer

Vanilla, Strawberry, & Mint Chip Splatfest start & end time, rewards - Splatoon 3

Switch – Page 5 – Kyle's Korner

Friends, Family & Solo Splatfest start & end time, rewards - Splatoon 3

Splatoon 3 announces chocolate-themed Splatfest