Hesitation
The morning after Ruuji left, he still has not returned. Kotona goes out to search for him, and comes across him staying at the home of the man in the Zaber Fang-type who saved him from the wild Zoids. Kotona recognizes the Zaber Fang as Soul Tiger, and its pilot as Seijuurou, supposedly the greatest Zoid pilot ever. Ruuji begs Seijuurou to teach him to become stronger, and he agrees to travel together with them.
Aired 12/06/2005EP 10 - Hesitation

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)