Your child tore through every Wimpy Kid on the shelf and now they're looking at you like you're supposed to produce another one. Here are six that scratch the same itch. Any one of them does the job, so read the notes, pick the one that sounds like your child, and hand it over. If it lands, every single one of these has a long series behind it.
It helps to work out what your child actually loved, because Wimpy Kid is doing about four things at once and each of these picks up a different one. If it was the doodles and the handwritten-notebook look, Tom Gates is the closest thing going — the page is practically all drawing. If it was the diary itself, Dork Diaries is the same format with a girl narrating and the friendship worries turned up. If it was Greg himself, the narrator who's certain he's the hero of a story he's clearly losing, that's Big Nate and Timmy Failure both, and they're the funniest two here — Nate in full-color comic strips you can read at any page, Timmy narrating detective cases he is spectacularly bad at solving. If it was the school comedy, the endless indignity of being eleven in a building full of rules, that's Middle School, where Rafe decides to break every one of them for points. And if what actually hooked them was that a book could be about a boy who hates reading, hand them My Life as a Book, which is narrated by exactly that and doodles a picture for every hard word. Pick by your child's taste and by age. Any one of these is a real answer to 'what now.'