
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.
Things have been mysteriously disappearing underground, making Johnny and Dukey believe that the people behind this are "mole people". When Johnny accidentally loses his dad's new camera, he must journey to the center of the earth to retrieve it before dinnertime, or he will be grounded.

Susan and Mary give Gil a piece of their special love "bubble gum", but by accident, it makes him transform. In order to save Gil and the others in pork belly, they have to give Johnny and Dukey some cool super powers.
Bling-Bling Boy has stolen a device that turns things into gold and Johnny must get it back before dinnertime.

Johnny tries to get his baseball back from an old man before the baseball game starts.
Susan and Mary are having a party and use a device on Johnny in order to make him look good so all the girls at the party will love him, but Johnny turns into a monster.

The Extreme Teen Team are on the loose and it's up to Johnny to bring them down.
Johnny uses an invention to breathe underwater, yet sharks and electric eels begin to walk on land and wreak havoc to the beach.

Bling-Bling Boy steals a backpack and Johnny must retrieve it so Susan and Mary can show it off at the school science fair.
Johnny goes back in time to ask Thomas Edison for a hockey invention and then to gather all of the vicious and ruthless "legends" he could find, in order to form a hockey team which will help the Ice Pigs win a game.

Johnny fills the house with some of Hugh's favorite things listed in his notebook. However, Johnny learns that the book was also full of Hugh's least favorite things (most of them scary.) To make matters worse, Lila's boss is coming over for dinner that night.
Created by: Scott Fellows
Available on: The WB, Cartoon Network, The CW, Teletoon, Boomerang