Ambush
Ruuji and the others mount a surprise attack on Digu - a show of power in an attempt to create more supporters of their army. They are countered by Bio-Tyranno, a Zoid piloted by Jiin himself. Their plan completed, the group flees from the city and heads back to Zuuri.
Aired 04/12/2005EP 35 - Ambush

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)