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 24 ·
The Destruction of Johnny X
Johnny and Dukey decide to remain in super hero mode permanently but find being a superhero is harder than they think.
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Episode 24 of season 4 of Johnny Test: “The Destruction of Johnny X”. Aired 2010-02-18. Watch it online free on ZapFlix.