Roger E. Bencozes is the antagonist of the Adventures of Mary-Kate and Ashley volume "The Case of the Christmas Caper." He is the hacker who broke into Santa Claus' workshop to hack into his computer. This is order to make sure all of the kids (including Mary-Kate and Ashley themselves) got no presents except himself (who would get them all). Of course, his name is an anagram of Ebenezer Scrooge, which he adds to the "Good" list. He is also responsible for stealing the elves' plane The Spirit of Christmas.
It turns out there are two of them, so he is the junior.
After the Olsen twins sing to him about what Christmas is about, Roger changes his ways.