Anime That Will Make You More Stupdier
AnimeUnlisted

TV, 2013,
12 eps
Me:-
Author:4
Not to be confused with Tantei Opera Milky Holmes which strongly boosts intelligence

TV, 2015,
12 eps
Me:-
Author:1
Also not to be confused with Tantei Opera Milky Holmes which strongly boosts intelligence

TV, 2013,
12 eps
Me:-
Author:-

TV, 2020,
12 eps
Me:-
Author:1
This won't just make you stupid it will turn you into a sociopath

TV, 2021,
12 eps
Me:-
Author:4
Watching the episodes in the order they aired will make you stupid (happened to me)