A monster morpher was a device which could make somebody look like an alien.
Sarah Jane Smith had a monster morpher in her attic. Clyde Langer, Rani Chandra and Luke Smith used it to appear as Androvax, Uvlavad Kudlak and a Graske. Sarah Jane came to the attic she used the monster morpher to revert the three to their true forms again. Then she told them the monster morpher wasn't a toy. A short time later Mr Smith reported an unknown life form. Luke, Rani and Clyde ran downstairs. Sarah Jane momentarily morphed into a Shansheeth, then she reverted herself and followed. (GAME: Monster Morpher)