Tron does not make an appearance in TRON 2.0; however, he is mentioned on several occasions. During Jet's search for the missing Tron Legacy Code e-mail fragments, a message from Kevin Flynn to Alan Bradley stated that Tron would have to be "shelved" after the request for an upgrade on their digitization research was denied.[1] The Legacy Code was originally intended to be an upgrade of Tron, so the program could better maintain the Game Grid and keep the arena free of unauthorized users. When a high-level compiler for the Tron Legacy Code asked Jet where Tron was, Jet responded by saying that Tron was "retired.