Trace Cadets

Trace Cadets is a 4-player and duel minigame that appeared in Mario Party DS. Its name is a pun on "space cadet", which is a term used for people who have their heads in the clouds.

Gameplay
A large grid of Tetris-like pieces will appear on four individual grids, and players will draw lines around the perimeter of the shapes. Whoever fills out their square first wins.

Winning
After the time is up, each part of the whole drawing is tallied, and the players win if they Completed their grid first.

Trivia

 * Some of the shapes used in the minigame is a reference to Tetris.