Lord Balarama: Who is He: Sometimes people ask who is Lord Balarama? And the answer is that He is the brother of Lord Krishna. However, He does many things besides that.
How we understand this is to first recognize that, according to Vedic scripture such as the Srimad Bhagavata Purana, it is described that Lord Krishna is the primeval Lord, the original Personality of Godhead, so He can expand Himself into unlimited forms with all potencies. They are no different from Him, but may exhibit differences in form and function.