Mao Mao: Heroes of Pure Heart - Season 1 Episode 20 -

When Mao Mao reveals the weapons and their abilities that his sisters received, he suddenly begins to feel demoralized that his own sword, Geraldine (which is basically a glorified glow stick), does not seem to be that impressive. Desperate to prove that his sword is worthy of its battle prowess, Mao Mao sets off to show its magnificent worth.