Homecoming - S1.E21

Ruuji, Kotona and Ra Kan head back to Mirodo village in Rainbow Jerk. They pass by a city under attack by Digald, and Rainbow Jerk is attacked by a Bio-Ptera, a flying Bio-Zoid. They manage to escape, but arrive at Mirodo to find the village slowly dying. Ra Kan and Ruuji explain the situation to the villagers and they agree that they should fight Digald. Ruuji and the others head back to rejoin the rest of the group.