What is "barbarika"

In the Skanda Purana, Barbarika ( IAST Barbarīka) was the son of Ghatotkacha and Maurvi ( Ahilawati), daughter of Muru, a Yadava king. Barbarika was originally a yaksha, and was reborn as a man. He was bound by his principle of always fighting on the losing side, which led him to stand witness to the battle of Mahabharata without taking part in it . In Nepali culture Kirata King Yalamber of Nepal is portrayed as Barbarika.

In Rajasthan, he is worshipped as Khatushyamji, and is believed to have been sacrificed before the Mahabharata war to ensure the victory of his grandfathers, the Pandavas. In return for his sacrifice, he was deified by a boon given by Krishna.