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Six-Sided: Other
Pentagonal Pyramid SkewbAn Ultimate Skewb with 6 sides "deleted".
Aka Extended Ultimate Skewb F80000000000000003FF07FEAA8000
Plateus BipolarA skewb (more precise: an Ultimate Skewb) in shape of a triangular dipyramid.
Proxy Cube (Earth)An MF8 Crazy 3x3x3 modified and extended on 4 sides, with 3 edges truncated.

Real kite cubeA 3x3x3 truncated on two sides into a prism with a kite-shape as base.
Rhombic PrismInvented and built by Tony Fisher in 1989.
RhombicCorner (Octagonal Edges Extended 200001087)A 3x3x3 truncated on 3 edges and afterwards extended. The result has a shape consisting of 6 triangles of two different kinds.

Rhombus Cube (Sharp Edges 180600000)A 3x3x3 truncated on 4 edges and afterwards extended. The result is a rhombic prism.
Rumbling prismA 3x3x3 in shape of a rhombic prism.
Shallower MadnessA triangular dipyramid with a slice pattern matching the Deeper Madness puzzle by Oskar van Deventer. However, the puzzle is shallow-cut, rather than deeper-than-origin-cut.

Single Axis Gear BoxA 3x3x3 with a geared mechanism, connecting two opposite sides.
Skewed Cube (Sharp Edges 12000000)A 3x3x3 truncated on 2 edges and afterwards extended. The result has the shape of a rhombic prism.
Slim fisher cubeA Fisher cube truncated on two opposing sides.

Square-1 PG (parallelogram)A Square-1 with the shape of a prism and a parallelogram as its base.
Squished Ghost CubeA ghost cube in shape of a rhombic prism which pretends to be of cubic shape.
Stretchex (mini)The 2x2x2-cousin of the Stretchex.

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