: While not a direct "paper" source, it provides the official vertical banner used as the standard digital cover. Desktop & Mobile Wallpapers
If you are looking to print a physical cover for your game case, you can find high-quality assets at the following locations: SpongeBob SquarePants - The Cosmic Shake [FitGi...
: Includes fan-made backgrounds in 3840 x 2160 resolution. : While not a direct "paper" source, it
: Offers high-resolution "Box - Front" (1151 x 1923), 3D box art, and even "Box - Spine" images. 3D box art
: Provides a collection of 4K and HD wallpapers specifically for this title.