The Greatest warrior in Mahabharat War that is not remembered. At least I hadn’t heard of him. But the story is absolutely fascinating! Barbarik is the grandson of Bheema, and son of Ghatotkacha. He is worshipped as Khatushyamji in Rajasthan.
Read Quote of Vikram Bhat’s answer to Hinduism: What are some lesser known/interesting facts about Mahabharata? on Quora