Kikai Sentai Zenkaiger S01E01 - The Machine World Is Mysterious!

Various parallel worlds, including those of past Super Sentai, were sealed into Toziru Gears by the Tozitend Dynasty of the parallel world of Kikaitopia. The final world in their sights was the one where Kaito Goshikida resides, but it was fused with a portion of Kikaitopia. A month later, the Kikanoids managed to integrate with human society, but the Tozitend launch an invasion, creating a massive rift in the unified society. While taking cover, Kaito accidentally activated his robotic bird-like companion, Secchan, who dragged him and Kaito's grandmother, Yatsude, to a secret lab created by Kaito's missing scientist parents and unveils the Geartlinger and Sentai Gears based on the past Super Sentai's worlds. Using the devices, Kaito enlists a heroic Kikainoid named Juran as they transform into the Zenkaigers and destroy the invading forces of Tozitend's field commander, Barashitara. After the battle, Kaito, Juran, and Yatsude discover the entire city and its population are sprouting mushrooms.