I mean it, every time I ask a Belgian or French person from around my age whether they remember this show, there's instant recognition.
It wasn't very special, they just filled hours of every day showing a slew of cheap Japanese cartoons between self-made sketches and game shows. It had something for everybody so everybody watched it (the fact that it was on almost every time you turned on the TV helped too). As a result everybody remembers different things, and when I ask them people will name shows that I have forgotten all about as their favorite.
I watched other cartoon slinging morning- or afternoon filling shows, but this one stuck with me because of the anime. First of all it was the golden age of Japanese cartoons, a lot of them are iconic classics by now. Secondly the others all showed the same American stuff. Thirdly my mother hated the violence in a lot of them (they even played hokuto no ken for 2 weeks until they had to stop it due to complaints, but it had already left a lasting impression on our playground). The Japanese manga and anime industry have a lot to thank these people for, thousands upon thousands of manga and anime lovers got the virus directly or indirectly through Club Dorothée.