Amy convinces Teddy to audition to be the school's unlucky ram mascot Whammy, due to Amy being Whammy when she was Teddy's age. Teddy doesn't want to be Whammy, so she tries to throw the tryout. Unfortunately for Teddy, she's the only person who actually tries out, so she gets the job by default. Her mom is excited but Teddy reveals that she never wanted to be Whammy in the first place during a huge outburst. Amy is dismayed and decides to fill in for Teddy, but when rival school, North High School, kidnaps Amy, thinking she was Teddy, she attacks them and goes back to the game, where Teddy is being attacked by North High's Viking mascot. Amy attacks the Viking and Teddy and Amy take down the Viking.
Meanwhile, PJ worries that he might become bald like Bob when he gets older. Later, he challenges Emmett to a baby race with his nephew Mason Heglin against Charlie. Charlie wins the race against Emmett's nephew. In this episode, Charlie takes her first steps.
PJ dreams that Teddy calls him to get ready for school. When he passes a mirror, he sees that he is Bob. PJ screams and pulls out 'hair'. This may because PJ thinks that when he gets older he will look just like Bob. Then PJ wakes up, and Bob gives him his first baseball cap that his father gave him.
The image gallery for Double Whammy.
Good Luck, Charlie.
Teddy: And you'd better like it because you're next. [Shows Amy holding Charlie in Whammy Costume.] Good Luck, Charlie.
Charlie does not speak yet.
Teenager: All right, let's see what nerd is wearing the costume this year.
[Takes off Whammy Mask.]
Amy: Look, if we're gonna drive around in circles for hours, can I at least use the bathroom?Teenager: Can't you hold it?
Amy: I've had four kids. I pee when I sneeze.
Amy: North High, South High, what's the difference.
Teenager: Only one thing, NORTH HIGH RULES!
PJ: We gotta train Charlie for the baby race.
Gabe: I thought the baby race was going to be you and Emmett in diapers. Now I've lost interest.
- This episode was watched by 5.1 million viewers.
- In Wentz Weather Girls, the have a rematch of the baby race, on tricycles this time with PJ and Emmett.
- June 26, 2010 (Disney Channel Poland)
- It is shown that PJ might be bald when he grows up, but he won't because in Take Mel Out to the Ball Game 40 years into the future, he isn't bald.
- Bridgit Mendler as Teddy Duncan/18 Year-Old Amy Duncan in a home video
- Leigh-Allyn Baker as Amy Duncan/Adult Teddy
- Bradley Steven Perry as Gabe Duncan
- Mia Talerico as Charlie Duncan
- Eric Allan Kramer as Bob Duncan/adult PJ
- Jason Dolley as PJ Duncan / 16-year-old Bob Duncan in a home video
"The Curious Case of Mr. Dabney"