Beauregard (left) and his cousin Mo (right)
Cousin Mo is Beauregard's identical cousin who helps out in the third issue of The Muppet Show Comic Book: Family Reunion, though his involvement is unknown to the rest of the staff, as well as to the reader until the last panel of the issue.
His appearance is a playoff on an earlier gag when Beauregard is seen carrying a ladder, appearing to be on both ends.