Sentry Robots appear very similar to Wall-E, with a silver color.
 Battle information
They often just say "Tick tock" in battle. They sometimes call for help, although it usually fails. They rarely attack, and if they do, it's usually weak.
Before battle, they say "Secret code please. Say your code in ten seconds. 10, 9, 8, 7, 6, 5, 4, 3, 2, 1." and then the battle starts.