Dongu is a plant based child form Spectrobe that evolves into Rapagu and then into Daidongu. Dongu can be excavated as a Dongupod in its fossilized state.
Dongu (child/first) looks like an acorn with leaves as ears. Its mouth is not attached to its body, instead floating above it whenever it is open.
Rapagu (adult/second) resembles a dinosaur-like creature. Its body is made of wood, and its back and shoulders are covered in a mixture of grass, moss, and small plants. It has two cannons on its shoulders from which it fires seeds and nuts. This is its main form of attack, and rarely uses melee combat.
Daidongu (evolved/third) resembles a quadrupedal dinosaur with a body covered in plant matter. It has a single cannon on its back which resembles a tree stump, and two smaller cannons on its shoulders. Unlike its predecessors, this Spectrobe form has three toes on each foot.