MK returns from another day of training to discover the city is invaded once more by Demon Bull King. However, his friends find that he has a new power that makes his army stronger and more dangerous than before. As they head toward DBK's lair, MK finds that there may be something more to DBK's power boost.
Tropes:
- Enemy Mine: Princess Iron Fan notices that DBK has become increasingly berserk after gaining the power from the formerly locked casket, to the point when he attacks her and Red Son. When MK arrives, they assist him in subduing DBK and freeing him from the corrupted power.
- The End... Or Is It?: MK and his friends defeat/rescue DBK and save the city once more. However, the demonic power that took hold of DBK escapes and finds a new host in the form of a young girl.
- Villain: Exit, Stage Left: A rather heartwarming one. After DBK is freed from the corruptive power, Princess Iron embraces him and teleports out of their ruined lair, with their son following them.
- With Great Power Comes Great Insanity: DBK becomes more hostile by the second after gaining the sealed power. Soon he thinks that his family is out to get him and, convinced by ominous voices, attacks them.
