The puppet of Ernst Bratfisch was one of the wooden puppets created using Gramm's Cyber-Technology.
Being modelled on Ernst Bratfisch in appearance, the puppet could also speak simple phrases with Bratfisch's voice. Given that Bratfisch was a cabdriver, his puppet was ideally suited for the role of a driver of the black cab with puppet horses. Although the horses could drive on their own, the cab attracted too much unwanted attention without a driver.
Following Johan Drossel's orders, puppet Bratfisch found the Eighth Doctor and Mary Shelley at the old location of the Marionettenburg at the Vienna Exposition and drove them to the new location in the house of Count Wittenmeier.