Are you saying France dubbed the third season without knowing what was going on in the original version? 0.0
No, France "MADE" the third season, you see, somethimes a anime becomes more popular outside Japan, so another conpany buys the rights and some of the staff to make new episodes if the show in Japan ended or was canceled. Sonic X ended in Japan, but a Freanch conpany bought the rights and the animators to make new episodes.
The animators where the same of the japanese Sonic X, but the script writers where French.
I saw another "third season" episode, it was the one with the human devastated planet, the “Eggman space ship” was a lot smaller that that huge robot, where the heck did he get the materials for building that robot?. Besides, why didn’t those humans tried to use the chaos emerald as a weapon if they had that thing since years ago?. And why everyone knows about the chaos esmeralds? even if they are a lengend, not everyone believes legends or knows them.
The episode could have been a lot better if the Metarex tried to get that Chaos esmerld, they completely ignored it existence in that episode. There wasn’t even a “What? They have a chaos esmerald?”.