Morden's Battleship is a boss from Metal Slug 3D. It appears as the 6th mission boss and is the second boss in the game overall (unless counting the missions 3 and 5 mini-bosses).
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It looks similar to Big Shiee in terms of apparence and strength, but it's stronger, has more weapons and a giant frontal minigun instead of a battery cannon.
It also can be used on both sand and water, and can stay under the sand similary to Sandmarine.