From the Super Mario Wiki, the Mario encyclopedia

Sonicmario22 is a 2000-year-old ghost who enjoys haunting Luigi in his mansion. If you see him, zap him with your strobulb and try to suck him up. TRY! NO! DO OR DO NOT! THERE IS NO TRY! He also appears in This Isn't a Real Game as the last, first, and third boss. Enemy stats: Attack:90 Defense: OVER 9000!!!!!!!! Awesomeness:( You may not see this number because it is too awesome for you. Please try again when your puny mind can comprehend this.