In Kamen Rider Gotchard, Geryon, an evil alchemist, advanced Malice Dolls through various experiments. He combined a Malice Doll from his pocket dimension with Neminemoon, creating Moon Malgam. He also crafted Saber Tiger Malgam by transmuting a Malice Doll and Sabeliger. Furthermore, he merged Yoacerberus with a Malice Doll, resulting in Cerberus Malgam. These transformations were integral to his scheme of opening the 'Door of Darkness'.