Mouse

In the episode "Mouse Big as a House" (Season 1, Episode 38) of the animated series "Boy Girl Dog Cat Mouse Cheese," Mouse, a regular-sized rodent, experiences a profound feeling of being overlooked and insignificant due to his small stature. Driven by this desire for recognition and to overcome his perceived disadvantage, he invents a device he calls the "Mouse-Magnifying Machine." His intention is to become bigger and more noticeable, but his invention proves to be far more powerful and uncontrollable than he anticipated. Upon activation, the device malfunctions, causing him to grow rapidly and continuously, leading to his accidental transformation into the colossal "Giant Mouse."