Attack of the Tetriminos! (テトリミノ来襲！ TETRIS SMASH, Tetrimino Invasion! TETRIS SMASH) was a Spirit Board event focused on spirits from the Tetris series, which featured Tetriminos as spirits. It ran from 6 a.m on October 25, 2019 to 6 a.m. on October 30, 2019 (UTC). During the event, defeating Spirits on the Spirit Board which were part of the event awarded more Gold than usual.
Description
- Five new spirits from TETRIS 99 will descend ominously to the Spirit Board!
- Defeat them in battle to earn more gold than usual.
- Tetris® and the Tetrimino shapes are trademarks of Tetris Holding, used with permission.[1]
Randomly appearing spirits
| Spirit | Battle parameters | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. | Image | Name | Series | Enemy Fighter(s) | Type | Power | Stage | Rules | Conditions | Music |
| 1,351 | I-Tetrimino | Tetris Series | •Corrin Team ( ) (×3)
|
 |
9,900 | 75m (Ω form) | •Assist Trophy Enemies (Color TV-Game 15) | •Hostile assist trophies will appear •The enemy favors down air attacks. •Only certain Pokémon will emerge from Poké Balls (Deoxys) |
Tetris: Type A | |
| 1,352 |  |
T-Tetrimino | Tetris Series | •R.O.B. 
|
 |
4,400 | Flat Zone X (Battlefield form) | •Assist Trophy Enemies (Hammer Bro) •Hazard: Screen Flip |
•The screen will suddenly flip •Hostile assist trophies will appear •The enemy favors down smash attacks |
Chill (Brawl) |
| 1,353 |  |
S-Tetrimino & Z-Tetrimino | Tetris Series | •Zero Suit Samus  •Samus 
|
 |
4,300 | Mushroom Kingdom U (Slide Life Tower) | •Sudden Final Smash •Item: Screw Attack |
•The enemy will suddenly have a Final Smash | Chill (for 3DS / Wii U) |
| 1,354 |  |
L-Tetrimino & J-Tetrimino | Tetris Series | •Luigi 
|
|
3,700 | Mario Bros. (Battlefield form) | •Hazard: Left Is Right, Right Is Left •Assist Trophy Enemies (Waluigi) |
•Left and right controls will suddenly reverse after a little while •Hostile assist trophies will appear |
Fever |
| 1,355 |  |
O-Tetrimino | Tetris Series | •Kirby 
|
 |
2,000 | Mushroomy Kingdom | •Assist Trophy Enemies (Thwomp) •Item: POW Block |
•Hostile assist trophies will appear •The enemy prefers down specials in the air |
Tetris: Type B |
Trivia
- The correct plural of tetromino in a mathematical context is "tetrominoes", but the Tetris franchise refers to them as "tetriminos" instead, making the event's title grammatically incorrect but correct in relation to the Tetris universe.
- Attack of the Tetriminos! is the first Spirit Board event released after the version 4.0.0 update to be followed by another Spirit Board event rather than an Event Tourney.
- Attack of the Tetriminos! is the first Spirit Board event based on a non-playable universe to come with more than 4 new spirits.