Because of its triangular shape, it seems natural to re-create Pyraminx patterns on the Mastermorphix. For example, this is a fairly accurate imitation of the Pyraminx's Tri-color Clover.
This pattern can also be created on the Magic Octahedron and Tutt's Icosaminx.
This pattern doesn't exploit the shape-changing capabilities of the Mastermorphix, but I'm working my way up to that!