Profilare as a character diverged from the Mario-canon Mario during the events of his home universe's version of Mario Bros., when he got covered in a strange, radioactive goo that corrupted his very being. He became a slimy sewer monster as a result of the incident, before freaking out, stumbling into a Warp Pipe shortly thereafter, and ending up trapped in the bowels of the earth.
Powers and abilities
Martello Profilare can separate pieces of his body to use as harmful projectiles, or compress into a puddle to dodge attacks. A unique ability of his is the power to generate a theoretically infinite number of hands out of his body. According to Word of God, this is a reference to the overuse of Mario's gloves as assets in older "3D" Fantendo character art.