Not exactly sure but probably it was Bakugan when I was 5-6.It's not fully japanese(Produced by canadian and japanese studios) but it probably still counts as anime.
It was a part of the Ben 10-Beyblade-Bakugan craziness of 2007-2012 Turkey.
I didn't watched the show very often but I remember some obnoxious main character with a blond timid kid wh......
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