In Journey to the west Sun Wukong learns to behave and start following a path of spiritual growth and wisdom that, at the end of his journey, leads him to becom

In Journey to the west Sun Wukong learns to behave and start following a path of spiritual growth and wisdom that, at the end of his journey, leads him to become enlightened and a Buddha himself. Much like Goku in Dragon ball, where trough the training and by following his master's teachings, he becomes a warrior with a noble heart that values friendship over everything else. After that, I agree, it's simply about becoming stronger and stronger.