Master Windmill CubeA 4x4x4 twisted inside of its solid. It resembles one of Katzuhiko Okamoto's most popular creations.
MegaHPA Megaminx transformed into the shape of hexagonal prism.
MegaRDA Megaminx transformed into the shape of rhombic dodecahedron though on three faces the puzzle still looks like the original megaminx.
Micro 1x2x3A 1x2x3 with 6 mm cubies, making it the smallest ever made.
Micro Axis CubeA very popular shape transformation of the 3x3x3 dramatically reduced in size.
MineminxA truncated megaminx in a strange star-like shape.
Mini Master OctahedronAfter the Master Octahedron from the same inventor another 5x5x5 transformed into the shape of an octahedron.
Minimal TwistA skewb so minimalistic that it is impossible to be stickered.
Minimorphix 2x2x2A pyramorphix in pillowed shape but with several holes in the pieces.
Mixup 2x4x4Looks like a 2x4x4 but like the Mixup Cube allows strange moves.
MK2 grenadeA transformation of the 3x3x3 with the shape of the namegiving grenade.