Go to the part where Grim and Numbuh One use the super skeleton strike slam. After the smoke clears, pay attention to Mandy. Put that part in slow motion as kids start popping out. Some of the characters are the Powerpuff Girls, Goo and Frankie from Foster's,...
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In the special episode of The Kids Next door (The Grim Adventures of the Kids Next Door) when many is torturing Number 1 in the beginning, Fred Fred burger in the TV says he likes "imaginary friends." This is a reference to the tv show, Fosters Home for...
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