Nintendo has announced the next in-game event for Super Smash Bros. Ultimate. It’s officially called Attack of the Tetriminos! Read on below for more details:
Attention all #SmashBrosUltimate spirit collectors! Five new spirits from #Tetris99 are slowly descending onto the Spirit Board for this week’s event: “Attack of the Tetriminos!” Play from 10/24, 11pm PT – 10/29, 11pm PT to earn them!
Pokémon Blog 
2 thoughts on “New Super Smash Bros. Ultimate event is called Attack of the Tetriminos! featuring five new spirits form Tetris 99”