Season 4 is the fourth season of Johnny Test. It premiered on November 9, 2009, containing 26 full episodes. It was the first season to both premiere on Teletoon first and to air on Cartoon Network. This is the first season to be produced in high definition. This season began airing on Cartoon Network on November 9, 2009. This would be the final season for Louis Chirillo and Ashleigh Ball as the voices of Dukey, Mary Test, and Sissy Blakely, although Ball returns later to resume her roles in Season 6. According to the credits, Warner Bros. still owns its trademark.
Episodes[]
- Johnny's New Baby Sisters / Porta Johnny
- Join the Johnny Scouts / Johnny B.C.
- Runaway Johnny / Johnny on the Spot
- Dark Johnny / No Homework for Johnny
- Papa Johnny / The Johnnyminster Dog Show
- Johnny's Amazing Cookie Company / Johnny's Big Dumb Sisters
- Dukey Jekyll and Johnny Hyde / Johnny's Trophy Case
- My Johnny Guard / Tom and Johnny
- The Quantum of Johnny / Johnny Get Yer Gum
- Old School Johnny / Johnny Degrees Below Zero
- Johnny Johnny / Johnny Double Coupons
- IJohnny / Johnny vs. The Mummy
- X-Ray Johnny / The Destruction of Johnny X
- Johnny Grow Your Own Monster / Who's Johnny?
- Princess Johnny / 99 Deeds of Johnny Test
- Johnny's Amazing Race / Johnny Test in 3D
- Guess Who's Coming to Johnny's for Dinner / Johnny's New BFF
- Johnny vs. Bling Bling IV / Johnny's Big Sister Smackdown
- Sunshine Malibu Johnny / Johnnycicle
- King Johnny / Johnny Re-Animated
- Johnny Cakes / Johnny Tube
- Sleepover at Johnny's / Johnny's Got a Wart!
- Johnny's Royal Flush / Johnny Test's Day Off
- Johnny and Dark Vegan's Battle Brawl Mania / A Scholarship for Johnny
- Johnny Boat Racing / Johnny Lock Down
- Good Ol' Johnny Test / Johnny X Strikes Back Again