Thread:Kowys/@comment-31232476-20181016200945/@comment-26495049-20181018074203

I believe the reason is that while this "Berserker Mode" is common lingo within the fandom, it has not been referred to explicitly as such in the anime itself. As the wiki is meant to be a source of official information, referring to that ability of Eren's as that would be misleading.

It's true that the ability itself hasn't been mentioned in his Titan abilities though, hmm. I'm sure a case can be made for adding it in given how unique the ability is.