Centrum Lyoko has found an interview with Sophie Decroisette, head writer of the first three seasons of Code Lyoko. The interview was conducted on June 26, 2013 and was published on the blog “Ces Dessins Animés-Là qui méritent qu’on s’en souvienne”. As a bonus, there was also an interview with Jérôme Mouscadet, director of Code Lyoko. A transcription of the interview in English can be found below.
First part: http://cdal.over-blog.com/article-interview-sophie-decroisette-partie-1-122826682.html
Second part: http://cdal.over-blog.com/article-interview-sophie-decroisette-partie-1-122826682.html
Video recording in French below.