I used to watch a cartoon on Disney Channel (the French version) about a teenager who is a spy on.The thing I remember about it: His favorite gadget was a yo-Yo.-He has a buddy , a blonde adult physical name of the boy was in the title (somthing like Jerry, Ben ,…) Do you know his name? It is not Kim Possible. The main charecter is much younger, more like a 10-year-old. Sorry if I was not clear.
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Kim Possible 0_o IDK
Does the blond guy look like this http://upload.wikimedia.org/wikipedia/en/a/a2/Rons1-1-.jpg
Well, since you said name in the title, Ben and ten year old, could it be Ben 10?