User blog comment:Gumball2/Is Leni Really Stupid?/@comment-32053026-20171003224606/@comment-32055298-20171004005533

It's part of her character since day one dude, in all honesty the answer is simple we hadn't gotten a Leni episode in a while and as a result she seems to be flanderized but really she is just the same as season 1. In all honesty the writers aren't at fault here, people just simply got sick of Leni's humor.