Red Skull Box
From the Super Mario Wiki
Red Skull Boxes are red artillery that appear in New Super Mario Bros. U. They resemble normal Skull Boxes, but are red and shoot Targeting Teds instead of Torpedo Teds. Red Skull Boxes, along with Targeting Teds, are found in the level The Mighty Cannonship in Soda Jungle. In New Super Luigi U they appear in Larry's Trigger-Happy Castle.