User blog comment:Sr.Wario/IMPORTANT FANONVERSE IDEA-PLZ READ/@comment-4736560-20140127212152/@comment-5810621-20140131000734

MattBoo actually will probably still be called MattBoo, since the word "boo" is something that most fictional ghosts say, and it's generic enough to not need to have any ties to the Mario series. Same with MattBomb.