The Sentry Mk. II (けいびドローンMk.II Ke ibi dorōn Mk. II?) is an enemy that appears in Sonic Chronicles: The Dark Brotherhood. An upgraded variant of the Sentry Drone, it is one of the Badnik models which was used by the Nocturnus Clan.
Following Dr. Eggman's presumed death and the Nocturnus Clan's attempt to escape from the Twilight Cage, the Sentry Mk. IIs were found by the Nocturnus Clan, who took control of them and began using them as a part of their own forces.
The Sentry Mk. IIs can only be encountered in the Nocturnus Clan's hideout in Mystic Ruins. Their basic attack is shooting a yellow laser at their opponent. Their POW moves are Evade and Buzz Saw.
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- Grossman, Howard; Taruc, Nelson (30 September 2008). "Enemy Chart". Sonic Chronicles: The Dark Brotherhood: Prima Official Game Guide. Prima Games. pp. 186–187. ISBN 978-0761559986.
- In Sonic Chronicles: The Dark Brotherhood: Prima Official Game Guide an error states that the Sentry Mk. II has a 25% weakness to earth. In gameplay, it has a 25% weakness to wind.