This Bydo is created internally by a Duster. As such, it's commonly found in and outside underwater in the presence of the Duster. Battalions will walk along the ground until they find a good spot where they will (permanently) deploy into an organic cannon capable of firing acid bolts, not unlike the Bydo Fluid attack seen in R-Type Command/Tactics. Pilots should be aware that Force units cannot block these acidic shots and will pass through unscathed.
This enemy is capable of converting between a pillbox and a two-legged walking unit.
They're found in The Cave.