Rotting Beast is a monster trapped in the Berry Cave in ancient times .
Since Rudy took Holy Berry from its tree , he awakened this monster .
He uses Counter Sweep and Cut Down . Since he is the first boss , he is easily defeated . However , you may waste 2-3 Heal Berries .
After defeating this boss , Rudy is forced to leave village and this msg has been shown :
"He used its power to protect. Now people fear and avoid him. He did not want such a power , but this destructive might is his . For he possesses the forbidden ARM . Unaware his inherent strenght , he wanders the wasteland , seeking his place in the world..."