When did Sasuke know the truth about Itachi?

“Truth” (真実, Shinjitsu) is episode 141 of the Naruto: Shippūden anime.

Who was the third person awaken mangekyou Sharingan?

I think in this context he means that Sasuke will be the 3rd person alive to be able to use Mangekyou Sharingan. Since Itachi is one, and Madara the other. The first one is Obito, then known as Madara Uchiha. The second one is Shisui Uchiha, a very good friend of Itachi.

Does Konoha know the truth about Itachi?

Only Sasuke, Naruto, Yamato, Sakura and Kakashi (possibly Shikamaru as he is Naruto’s right-hand man) are the only ones left that know about what Itachi did. Itachi, when reanimated told Naruto to not tell ANYONE about the coup: Because he promised Shisui that he would protect the village no matter what.

Why did Itachi awaken his mangekyou?

Probably, just witnessing Shisui’s death to protect the village was traumatic enough for Itachi to awaken his Mangekyou. Also, if you remember, Sasuke’s Mangekyou activated when Itachi died. He did not kill him either, but witnessing his death, even though he hated him, was traumatic enough to activate it.

Why did Itachi kill Sasuke’s brother?

Itachi put on a pretense of wanting to steal Sasuke’s eyes and become even more powerful, but Itachi soon realized his intentions for Sasuke had backfired – his brother hadn’t learned from the loss of his family, but become consumed with a need for revenge. Around the same time, the elder Uchiha brother also realizes his death is imminent.

How did Sasuke get his mangekyou powers?

In the episodes following the fight, we learn that Itachi implanted his Mangekyou powers (Amaterasu, etc.) into Sasuke. Those powers activated when Sasuke looked at Madara’s Sharingan; as Madara explained, Itachi made the abilities self-activate when they came into contact with Madara’s Sharingan.

Is Itachi’s mangekyou sharing a plot hole?

What Itachi says because in The Itachi Story Arc we learn that Fugaku Uchiha, his father, possesses the mangekyou sharing and shows Itachi. Also Itachi tells Sasuke the story of the Izanami when he is reanimated and mentions the existence of many other Uchihas who possessed the mangekyou. Therefore, it must be a plot hole.