From the Super Mario Wiki, the Mario encyclopedia
The Pizza Transformer is an extremely large device apparently owned by Mario, Luigi, and Edison in The Super Mario Bros. Super Show!. The Pizza Transformer is seen only in The Super Mario Bros. Super Show! live-action segment "Cher's Poochie". The Pizza Transformer can switch two bodies by zapping them with blasts of energy, as it did with Mario and Cher's dog, Poochie.
Among the components of the Pizza Transformer, there are two computer screens, two keyboards, various wires and a large switch.