Out of the crazy house, Kouchu and his friends, messy from the pranks the prankster have set, they decided to go to the hot spa. The nice old lady recommend Shauna the blue potion for 50 peridots. When Shauna bought it and accidentally test it on Mouselette. Shauna's Mouselette turned big and aggressive after drinking blue potion that the clerk of the CrystalMart have given her. Everytime Mouselette gets angry, she grows and grows more. She began to grow into a big giant. To shrink Mouselette back, the brawlers use kindness and friendship. After that, the brawlers head to Dark City.
