Board Thread:Theories and Speculation/@comment-45510280-20200416210937/@comment-9782468-20200419161244

I don't personally consider the novels canon because they give feats outside of the character's usual abilities. For example Kakashi summoning rain clouds by shooting a super powerful Shiden.

In terms of Itachi using Tsukuyomi to this extent, I also don't find this plausible because the anime had every opportunity and then some to show this. They had official flashbacks of the Uchiha incident, they had filler flashbacks of the incident, the had flashbacks of the incident from different POVs, everything. The feat is such a huge outlier because it shows up in one instance in a novel where feats are already not in line with character abilities.

All those things make it seem like it's not within Itachi's abilities.