Digimon Frontier

On the way to the Forest Terminal the gang winds up at Wind Factory. There, they meet the Kokuwamon, a group of machine Digimon who are being forced into slave labor by the Goblimon. So Takuya comes up with a plan to save the little guys but once the fighting starts, they meet the head honcho, Snimon. When the Spirit of Thunder is uncovered, J.P. jumps at the chance to Spirit Evolve into Beetlemon and then uses his Thunder Fist to squash Snimon.