Dou! started being recognized in the French smash community with his HRC high score. Then, in February 2004, he discovered that "the HRC mode was far more limited than the VS mode", and decided to give up HRC to become a great VS player. He then managed to become one of the best French players. He attended many tournaments in France, and also two tournaments in non-French countries: RoS3 in Sweden and ATM3 in the Netherlands. However, in September 2006, he entered a school in order to complete a math degree, and had not as much time to play smash as he did. Therefore, he could not keep pace with the other top French players when it comes to improve his game and lost his professional smasher status. He remains nevertheless one of the best and most respected French players, and also the best Jigglypuff player in France and possibly in Europe.
He has also organized two tournaments: the GDT (Green Destination Tournament) and the RDT (Royal Destination Tournament, where he lost to Captain Jack in finals, after defeating Joanna Dark). Those were considered two of the best tournaments in France, in particular because of their excellent organization.