Pikki and Matz

Pikki and Matz is a comic by Sara Choo. Greg buried the comic in a pile of papers so that it wouldn't be found, because, as he said, even though the jokes weren't good, the adults would go crazy over the cute animals. It only appears in the online version.

Appearences

 * Diary of a Wimpy Kid Online (First and only appearance)

Trivia

 * Pikki is the cat and Matz is the mouse.

Link
http://www.funbrain.com/journal/Journal.html?ThisJournalDay=247&ThisPage=5#booktop