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 1 · Episode 18 ·
Sonic Johnny
Johnny and Dukey try Susan and Mary's ultimate scooter and are wanted in the future.
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Episode 18 of season 1 of Johnny Test: “Sonic Johnny”. Aired 2005-11-26. Watch it online free on ZapFlix.