From April 21, 2023, at 4 pm JST to April 25 at 3:59 pm, a collaboration event between the Nintendo Switch game Tetris 99 and the Nintendo Switch game Kirby's Dream Land Wii Deluxe will be held exclusively for Nintendo Switch Online subscribers. The event is called the "33rd Tet 1 Cup: Kirby's Dream Land Wii Deluxe Collaboration Festival!"
Kirby in Tetris
During this collaboration event, if you collect a total of 100 event points that are given based on your ranking in the "Tetris 99" mode, you will receive a special event theme for "Kirby's Dream Land Wii Deluxe".
Source: Famitsu
Contributed by nado