Shimainu is a fire/earth based child form Spectrobe that evolves into Shimanoto and then into Shimadoros. Shimainu can be excavated as a Shimapod in its fossilized state.
Shimainu (child/first) appears to be a shitzu-like dog with two long tails. It has a wooden barrel-like shell that covers all but its face and rear.
Shimanoto (adult/second) is a dog-like Spectrobe with a structure covering its head. It appears very hairy with two flame decorations on its tails, both of them pointing upward before angling down again.
Shimadoros (evolved/third) appears as a dog-like Spectrobe with a large structure covering its entire back. On top of this structure is a pair of horns with a spike on top. It also has a pair of cannons on its side.