Mario Bros. 3x3x3Each side has a different Mario Bros. character and color. Mario, Luigi, Princess Peach, Yoshi, Wario and Bowser.
Mario Kart 8 Rubik's CubeA promotional 3x3x3 depicting scenes from the game Mario Kart 8. It was given out to those who pre-ordered said game.
Mars CubeThe choice of brands advertised on this cube is very strange.
Maze Cube (3x3x3)A 3x3x3 custom sticker variation, filled with mathematical considerations, which shows a single closed loop line on it.
McDonald's CubeApparently only given to managers at an important meeting of some sort.
Mercedes BenzThis version has various shades of grey, blue and black and a logo on every side.