3-2-1 Penguins! (2000)

S3E5 Do Unto Brothers

During a space adventure, the Penguins fall into the clutches of the wicked Cavitus. In her effort to rescue them, Michelle finds herself tumbling down a gummy worm hole, which lands her in even greater peril. To save her friends, she must discover the importance of treating others as she wishes to be treated herself.