In the 21st century planet Earth was rendered inhospitable to life, and people mass-migrated to Planet Zi, the natural home of metallic life forms known as Zoids. Many years later, Zi faces its end. Its inhabitants partake the journey to migrate back to Earth. Attempting to regenerate the Earth to make it hospitable, the migrants come up with a Zi-Forming scheme. However, the plan fails and Earth is left in its state of turmoil. Overrun by Zoids and blanked by unstable weather phenomena, the migrants are faced with a difficult life. The Empire and Republic settlements attempt to uncover Zoids buried within the Earth to bolster their respective armies. The story picks up following second-generation Earth citizens: Leo Conrad and Buzz Cunningham, who have a chance encounter with a girl Sally Land as she flees the clutches of the Empire. (Source: Zoids Wiki)

Battle CG anime based on the Zoids Wild franchise. (Source: ANN)

In a remote desert on the Planet Zi, a boy named Van discovers an abandoned, dilapidated facility. Inside, he finds an opaque cocoon that breaks on its own, and a dinosaur-like robot known as an Organoid emerges from the shell. Van names the creature Zeke and claims it for himself, but a group of bandits come after him to seize the Organoid. The bandits are equipped with Zoids, beast-like mechanical units that are used for combat. Van is able to fend off his pursuers by reviving and fusing with an old Zoid dubbed the Shield Liger. Van returns to the facility with Zeke in tow and finds a new cocoon. He is ecstatic that he may have obtained another Organoid, but when the cocoon breaks, a girl emerges from it instead. Unaware of her origins, the girl only remembers that her name is Fiona and that she has to locate an object called the Zoid Eve. Determined to solve the mystery behind her existence, Fiona ventures out alongside Van and Zeke to uncover what the Zoid Eve truly is. The trio runs across many friends and foes in their adventure, encountering various dangers and experiencing slices of light-heartedness as they travel.

Natural disasters have devastated planet Zi, killing off almost all life. A thousand years later humans have gradually re-established civilization, salvaging ancient Zoids through diving and mining efforts. In a village whose most previous item is a giant sword which they worship as a holy symbol. A teenage boy discovers an ancient Liger-type Zoid while on a deep water salvage operation. Suddenly the village is attacked by skeletal Bio-Zoids intent on stealing a powerful generator located in the village. Our teenage hero awakens the Liger and discovers that the town`s sacred sword is the Liger`s weapon, together they fight off the mysterious Bio-Zoids. At least for now... (Source: AniDB)