So a friend lent me Super Smash Bros. 3DS because I’m apparently a demon in Smash where I’m in, and lemme tell you that secret final boss is one fun boss to fight. At times. Though I’m not the Ganondorf that beat it with 0% damage, I CAN tell you a few things about its movelist.
There is a Smash theory by Gnoggin about Master Core and that it could represents the inner dark emotions of a male individual who is diagnosed with Autism. So yeah, Master Core could represent some part of human psychology.