Rowley Junior was the egg of Rowley in The Ugly Truth, when Nurse Powell gave every kid eggs and told them to bring it tomorrow without breaking it. Greg and Rowley were the only boys who didn't break their eggs. However Greg's was made into a scrambled egg by mistake by Susan. So, Greg tried to swipe Rowley's egg and pass it off as his own, but by the time he tried to, Rowley had already drawn a face on it, making Greg have nothing to pass in.
- The egg had seven strand of hairs just like Rowley and round eyes and a mouth just like Rowley and a bow tie in the center. Some lines starting from there making it look like a dress.It was made to resemble Rowley. And it was his best friend before it went into the garbage can.
- There is also a game based on the egg called Don't Scramble the Egg