Left:  There are three friends in Harry Potter.  There are three Baudelaire siblings.  A crossover was inevitable.

This was also partially inspired (or, rather, provoked) by my Halloween costume.  I went as Violet. Nobody knew who I was and nobody cared how much attention to detail I put in (because they are all sane, and I am not) but it was fun.  I did get a number of long stares from kids who came to the door, but I don't think they were stares of recognition.

Right: Professor Flitwick.  His hat is taller than he is.  I don't know why, but this seemed to be the right way to draw it... 

Fred and George must eventually find out that Lupin was one of their hitherto anonymous heroes Moony, Wormtail, Padfoot and Prongs, who taught them "everything they know."  What would their reaction have been?

Thanks to DarkRa for planting this observation in my brain... 

With the Potters' location hidden in a Secret-Keeper, Voldemort could have his nose pressed against their sitting-room window and not see them.

Taking things literally again ...