Sit back, Relax and watch the video.
Yu had some great memories of battling with his dad in beyblades, and buying beyblades. But his dad's death is most terrifying to him. he wants to kill the man. His feelings take over and his Sharingan becomes the Mangekyou Sharingan. Now he can see every attack in 360°. His sharingan resembles Itachi's, but does not act the same. His speed increases like a Mangekyou, but he can see 360°. No blind spots. Q and A: 1). Who killed Yu's dad? A man in a trench coat. His hat covered his head and his shades covered his eyes. Spoilers will not be revealed. 2). Why is his Sharingan Itachi's but doesn't work the same?! Makes the story more interesting. Don't get mad. 3). How did his Mangekyou change? Intense emotion. This is actually what activates the Mangekyou.
