Super Mushroom vs. Super Star

Super size from a Super Mushroom vs. Invincibility from a Super Star is a Splatfest event in Splatoon 2. It will be held globally to celebrate the 35th Anniversary of the Super Mario series. It was announced during a Nintendo Direct on 2020-09-03. It is the first Splatfest with an original theme since the officially dubbed final Splatfest, Chaos vs. Order.

Details
The Splatfest theme is about two power-ups from the Super Mario series: the Super Mushroom, which grants super size, and the Super Star, which grants invincibility.