CanGuard, known as "CannoGuard" (キャノガード Kyanogādo?) in Japan, is a virus in the Mega Man Battle Network series that appears to be an upgraded version of the Canodumb. Like their predecessors, CanGuards send out a target reticule when a NetNavi is standing on the same row they are. If the Navi comes in contact with the reticule, the CanGuard will fire onto that panel. All CanGuard variants (except the CanGuard itself) close their shields when they're not aiming, protecting them against all non-Breaking-type attacks. The first time it aims it will go along all the rows but after it fires it will automatically aim on the target.