-( Story related, cannot be missed )-
Level: Mountain Pass
To pass from Rock Village to Volcanic Crater where the Red Sage is, you have to defeat the guy (Klaww) that has been attacking the village. Carefully jump down onto the platforms and you will start the fight. Jump between the platforms and dodge the boulders being thrown. The last one will break up and release some Blue Eco. Once you collect it, you will build a bridge further down the lava basin. At the end are two Yellow Eco orbs, which you will need to use to hit Klaww in the stomach to disrupt his attack. While he is attempting to create a large boulder to hurt you, shoot him about six times to throw him off and bean him with his own attack. However, you will need to run quite fast after you disrupt the attack, as that very boulder will end up rolling down the bridge.
Rinse and repeat two more times to complete this fight. The bridge will lose more and more pieces as the battle continues, and his shots will speed up as well. With the third and final hit, you will see him thrown into the lava once and for all and be rewarded with a Power Cell from the boulder attack. You will also find that platforms are forming at the end of the bridge leading out of the basin and further into the valley beyond.