The X-Change Student / Red Moon Monsters

S1 E6: Mona and Charley beam a message via satellite to extraterrestrials across the universe - and, the very next day, an exchange student suddenly shows up at school. Coincidence? Hardly. Mona suspects that Cedric is, in reality, a cleverly disguised alien there on an advance scouting mission. To make matters worse, it turns out that the "x-change student" will be staying at her place for the week. / Mona's attempts to ward off an imminent invasion by red moon monsters are stymied by the new next-door-neighbor - a shy, introverted girl named Lily Duncan whom she is forced to entertain for the evening. But before night's end, the reserved Lily does a one eighty turn around. With Mona's help, she transforms into the lively Princess Giant, thwarts the red moon monsters, and discovers a spirited part of herself she never knew existed.