|Needs a stretch!|
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|First appearance||WNSD: It's Mean, It's Green, It's the Mystery Machine|
|Voice actor||Kath Soucie|
Susan Dinwiddie is the mother of a family that was once involved in the music business.
She has short blond hair and is quite attractive.
She is ruthlessly ambitious for her children's music career.
What's New, Scooby-Doo?
She wanted to bring back her kids' band, the Mystery Kids so she decided to control the Mystery Machine so Andy & Mandy would be bigger than ever. However, she ended up somewhat neglecting her other kid, Randy, in the process.