When Does Yoko Kurama Appear?

Yoko Kurama! // Densetsu no Tōsoku! Yōko Kurama" (伝説の盗賊! 妖狐·蔵馬) ) is the twenty-second episode of season 2 of YuYu Hakusho. It aired on September 11, 1993 in Japan and May 7, 2003 in the United States.

How did Kurama lose to Karasu?

Karasu, who is now in control, straps a bomb to Kurama's leg, and detonates it. ... Kurama has sacrificed himself to kill Karasu, or so he thought. It turns out that he still has energy left. He later realizes how he survived, that every time he transformed into Yoko Kurama, he retains some of his energy.

How many tails does Yoko Kurama have?

According to the anime (screenshots below) he had four tails at the time of his death. That final screenshot is cut off, but you can see the base of at least three tails, and the first two images each show four. According to Wikipedia, “Kitsune are a type of yōkai; the word kitsune is often translated as fox spirit.