When we talk about the maharathis of the Mahabharata, Bhima was one of them. A giant Goliath like personality, Bhima was a valiant fighter and had slain many kauravas in the war of Mahabharata.
He was the second child of Kind Pandu and Maharani Kunti. Since the couple became practically barren due to the curse of Kindama Rishi, they decided to mitigate their grief by being dependent on the blessing of Durvasa rishi who blessed Kuntidevi in her juvenile age that she will be able to call any demigod by this mantra.
When Kuntidevi called Vayudeva, he gave him the son named Bhima or Bheemasena which means which has a formidable army. Bhima had got the prowess and strength of 10,000 elephants by eating a medicine which his maternal grandfather made for him.
He was trained by Dronacharya and Kripacharya to be a expert in Mace fighting, hence known as Gadadhara. He is also known as Vrikkodara i.e. having a voracious appetite.
His stomach has a special type of agni burning and it is so violent that he needs huge quantity of food to settle it down. Sometimes, he would be eating food that the 4 pandavas required to eat and still remain unsatisfied.
He as blessed by his grandfather Vyasadeva to fast for only once a year to atone for his sins. By his grace, the Pandava Nirjala Ekadashi was blessed by the Lord to be able to render the sins burned to ashes by once fasting on it and is sufficient for the whole year.
He was married to Hidimbi demon, sister of Hidamba demon and had a son through her, Ghatotkacha.