Greg Heffley is a CPU Mii.
In Tennis, Greg Heffley's level is 3200/3300. In Baseball, his level is 103020 and his team is Carl Wheezer, Meggy, Michael Tutori, and others. He appears on the teams of Northwest, Jocelynn, Bathaniel Nandy, Jack, Ariella, Jon, Christine, and Funta. In Boxing, he is pretty bad, with a level of 48-134.