Thundor (デンゴロン Dengoron) is an Adult form Spectrobe of the CoronaProperty. It is the Adult form of Thunba, and evolves into Thundora. It is the Thunder equivalent of Winbus.
Thundor has an appearance resembling a turtle. It crawls on four legs, and features multiple lightning bolts on its body, including on its head, along its back, on its sides, and on the end of its tail. On its back are a pair of blasters, similar to Winbus, and beside those are two drums, with the Japanese kanji 雷 (rai, "thunder") printed on them. On its head are a pair of outward-facing horns both on top of its head and under its mouth.