Unknown Male Sheep

Unknown Male Sheep is an unnamed character that appears in "D.W.'s Library Card". He stands in the line to check out books when D.W. is asking for the first time if Hopalong The Frog has been returned yet.

Trivia

 * He looks similar to Mary, just like Aloysius Zimmerplotz looks like 3rd Grade Female Cat. Both only appear in "D.W.'s Library Card".