River of Mist
Torafu's defense force is sent to protect Atakka. Meanwhile, the rebels begin arguing amongst themselves. The Elephunder team heads out by themselves, and the other groups follow, each determined to be the first to reach Torafu. Split apart, the rebels make easy prey for Zairin's Bio-Zoids. When Zairin learns that Ruuji has arrived, he heads out with Mega-Raptor to fight him. Murasame Liger transforms into Hayate Liger and defeats Mega-Raptor, also breaking the dam that kept water out of the River of Fog. The water flows down the river and washes away the Bio-Zoids.
Aired 02/10/2005EP 26 - River of Mist

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)