Griffin was Carly's boyfriend in the special, iDate A Bad Boy. Griffin is caught taking Spencer's motorcycle for a joyride, and instead of having him arrested, Spencer decides to mentor him in art. At first, Carly is infuriated that Spencer has taken a criminal "under his wing."
Later, when Spencer comes back to the apartment from the Groovy Smoothie, he finds Griffin and Carly making out, which makes him scream in horror for a long time, and Carly admits she kissed him. Now, their opinions are reversed: Spencer hates Griffin and Carly loves him. They secretly date, much to Spencer's chagrin. Later, after Spencer finally accepts that his younger sister is growing up, Carly finds out Griffin collects Pee Wee Babies (a parody of Beanie Babies), and disturbed by this, she tries to change him by giving him a power drill. Griffin doesn't get the message, and continues his obsession with Pee Wee Babies. Carly nearly destroys Griffin's "Peter the Penguin" with the power drill.
In the end, they break up because the Pee Wee Babies ruined Carly's image of him as a "bad boy," and she makes fun of him. He then walks away, making their break-up official.
In iBeat the Heat, Griffin asks Carly if he can use her air conditioned apartment to keep his Pee Wee Babies cool, because very extreme heat can cause them to "misshapen". He leaves at the end of the episode, without even a goodbye, when the air conditioning returns to the building. That has been said to be Griffin's last appearance in the series.
Griffin is portrayed by Drew Roy, who also appeared as a bad boy on Hannah Montana in the episode, "He Could Be the One."
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