Fatal Flaw
The Digald forces, led by Felme, mount their attack on Sora City. They break through the energy shields and engage in combat with Sora's automated defense Zoids and its two Decalto Dragons. The Digald army quickly penetrates the city, destroying its generators and causing it to collapse and fall to the ground. The people of the city board Gildragon and Kotona and Souta successfully land them safely.
Aired 26/02/2006EP 46 - Fatal Flaw

Zoids Genesis
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 towns sacred sword is the Ligers weapon, together they fight off the mysterious Bio-Zoids. At least for now...
(Source: AniDB)