From Ratchet & Clank wiki
Sentry-bots were the robots created in the same factory that
Clank came from. Clank was actually a malfunctioned Sentry-bot.
Ratchet could use the
Hologuise to get pass these robot guards on planet
Quartu and
Drek's Fleet. If Ratchet was not wearing his
Hologuise, they would either shoot fire balls at him or press an alarm button to activate fort defenses. If Ratchet waved at them while using the
Hologuise, they would wave back and deactivate forcefields so he could pass.
[edit] See also
[edit] Appearances