The master reaverbot of the Manda Island Ruins is a large frog called Galgalfummi. Also found on its turf are spinning blades, Otomarn and Balfura.

Galgalfummi is probably the most complex reaverbot in the entire game in terms of the variety of things it can do. For basic attacks it may open its mouth and release floating bubbles, or whip out its long tongue instead. For a close range it will release poisonous gas from the top of its head. If a digger is attacking it from a distance, it may leap from one platform to the next in an attempt to crush its foe. Finally, when its energy is getting low it can use its tongue to catch and eat a flying Balfura which will restore some of its hit points.

A second type of stronger Galgalfummi with darker colors can be found on Elysium.