The Energy Beast - S1.E7

After a meteor falls to Earth, an investigating man finds nothing there but a mysteriously glowing tree. After he leaves, the ‘tree' reverts to its true form, an alien beast that resembles a giant centipede. Requiring large amounts of energy to survive, the Energy Beast attacks the Mesa City Dam, absorbing energy from its hydroelectric turbines, and growing much larger in the process. Since the Calico crew is (conveniently) in Mesa City at the time, they summon Godzilla, who drives off the alien Energy Beast, but the former appears to have been injured in the process. A short time later, a mysteriously glowing Godzilla attacks an electrical power plant, and fails to respond to either the crew's signal, or Godzooky's call. This leads the crew to suspect that Godzilla either went mad after his encounter with the Energy Beast and became such a creature himself, or that there is somehow more than one Godzilla (actually, any 6 year old with half a brain immediately figured out what was real