Patch (Super Paper Mario)
From the Super Mario Wiki
Patch is a character in Super Paper Mario who lives in Flipside behind Saffron's restaurant. He is a window-shopper who goes to every shop in Flipside just to stare at the goods. Because he takes up space real buyers could use, shopkeepers always shudder whenever they hear him coming to the store.
He seems to enjoy Flimm's store.