If you've wondered why the French studio, Moonscoop, has been very busy obtaining American properties such as Sabrina, chalk it up to the success they enjoyed after importing Code Lyoko to the US.
Code Lyoko debuted in 2003, airing in the US on Cartoon Network as part of its Miguzi block. In all, the series ran for 4 years, with a finite ending that not many of us have seen here.
The story is built around 5 teenagers, later 6, who fight in the virtual world of Lyoko against a rogue artificial intelligence, XANA, which has gained control of Lyoko. For a good part of the run, one of the kids, Aleita, was in Lyoko full-time, but eventually returned to the real world. In the last episodes I remember seeing, I think they were trying to build a relationship between Aleita & Jeremy, the team leader.
Today, Kabillion has the rights to the series, but on some cable systems is only available as a On Demand service.
Following is a sample episode: