Johnny Test
Young Johnny is gung-ho and full of courage. Johnny's brainiac twin sisters, Susan and Mary, use Johnny as their guinea pig for their outrageous scientific experiments. If they can dream it up, Johnny will do it; as long as his genetically engineered super dog, Dukey, can come along.
Season 4 · Episode 29 ·
Princess Johnny
Johnny poses as a princess in order to prevent a war. Meanwhile, Susan and Mary decide that they would like to act like normal girls.
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Episode 29 of season 4 of Johnny Test: “Princess Johnny”. Aired 2010-05-24. Watch it online free on ZapFlix.