Xiao Cheng (小程 or 小成 in Chinese) is a professional video gamer, who nobody has beaten before, he only appears in the online book. Greg Heffley wishes of being the first person to defeat him in a video game. This was why he signed up for the video game contest at Electronic Hut.
Judging by his name (Which is chinese), he would be of chinese descent.
- Diary of a Wimpy Kid Online (First and only appearance)