Quoted By:
The combination of two Types may now create a new and unique Type through the use of an item/mechanism/ability/NPC/whatever. Dual-type Pokemon may be 'purified' into Single-type Pokemon, creating 'Pseudo-Types' with unique properties. For instance, Water/Ground Pokemon may be transformed into the 'Mud Type', which is not weak to Grass, retains STAB on Water and Ground moves, and is immune to Ground moves. How retarded is this idea?