Memories of Zi
After defeating Stinger, and his Saber Fang Stinger Special, Van and the rest continue their journey to Guygalos. Metelinick gives Minister Prozan, the Ring of Guylos. Then Van and the guys are talking about how they are going to get Rudolph back to Guygalos. Stinger makes it to a bar in a village, where he tells the Krossbow Brothers immediately make there way off to where Van and the rest of the gang are, in Desert Hel Digunners. Dr. D finds out Fiona is an Ancient Zoidian, a lost race of people that were thought to be whipped out a long time ago by the Deathsaur. Meanwhile, Raven is heading off to destroy another fortress in the Republican Army. At the palace, Minister Prozan announces to everyone Rudolph has been assasinated by an elite squadron of Republican Forces and Then he takes the throne. Raven attacks with the Genosaur and the fortress attacks with several Gordos, but Raven was unharmed within 3 minutes the base in complete ruins. Then the cores of the zoids were ripped out
Aired 04/03/2000EP 26 - Memories of Zi

Zoids
Zoids are beast-like fighting machines used in both everyday use such as transportation, and special use such as war. Some types of Zoids, know as Organoids, are miniature Zoids that are living organisms. These Organoids have the capability to fuse with a non-living Zoid and make it much more powerful.
Van (Ban) Freiheit discovers a Zoid Organoid in an abandoned laboratory while running from two strangers piloting Zoids. Also in the laboratory, in an animated suspension tube is a strange girl. He breaks the tube open and takes her and the Organoid with him. Spotting a ruined Shield Liger Zoid outside nearby, the Organoid fuses with it and repairs the damages. Making his escape, Van names the Organoid Zeke, and decides to keep him as a friend. The girl, who says her name is Fiona, wants to find something called Zoids Eve, and so Van, Zeke, and Fiona begin their adventure.
(Source: AniDB)