The Duel at the Ancient Hot Springs Village!

After planting the rice with Grand Bomber, White Bomber asks Grand Bomber if he wants to join the Jetterz!! Everybody like the idea, that is, except for his brother, Thunder Bomber! So Thunder Bomber comes to the planet to defeat the Jetterz once and for all, but, Grand Bomber says he will instead. Will Grand Bomber go through with his promise, and actually fight White Bomber?!?!?!