Another Tetris 99 crossover event has been announced. Beginning on August 23, 2019, the Tetris 99 Fire Emblem: Three Houses-themed 6th Maximus Cup will begin. People who participate and earn 100 points will permanently unlock a theme based on Fire Emblem.
All people need to do to take part is play Tetris 99 between August 23-27, 2019. Each game you play will earn you points, and placing higher will earn you more. The theme will be in effect during the event, letting you see what it is like. Once you hit 100, the Fire Emblem: Three Houses is permanently available.
Tetris 99 is available for the Nintendo Switch, as people who subscribe to Nintendo Switch Online get it for free.