Uncle Larry is a moth that helps to block out something that is seemingly important to the readers of Dog Man.
He is the uncle of Daryl the Moth in the book and both of them are the cause for Piggy getting captured. "How does that work," you ask? Well basically, Daryl is REALLY stupid and becomes a team with Piggy called "The Friendly Friends", after Piggy is thrown on to him by Big Jim and, later, Piggy tricks him into thinking that Piggy is "protecting" (he's actually stealing it) the Hope Mood Ring by picking it up and taking it away. But, when the Ratterfly passes by while Daryl is holding the line that is holding Piggy and Daryl, of course, thinks that it is Uncle Larry and pulls Piggy out and drops him on Commander Cupcake. The real Uncle Larry is meeting up with Daryl at that part I mentioned at the beginning and they are talking which is why that part is covered up.