I used try to remember and I was searching for cool free backgrounds in deviantart. This guy’s profile said his favorite character was sam from totally spies. The name got me thinking so I googled and an found the girl version. I remember when I was younger seeing some kind of knock off of it with 3 boys who look similar to them. I remember the theme song just not the name anymore. This is a picture of the main show.
[quote]It is a spinoff of Totally Spies!.
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I think you’ve found it.