For high-resolution backgrounds to match your installation, check these sources:
: Contains a dedicated gallery for key art, prototype covers, and promotional materials. SpongeBob SquarePants - The Cosmic Shake [FitGi...
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...
: While not a direct "paper" source, it provides the official vertical banner used as the standard digital cover. Desktop & Mobile Wallpapers SpongeBob SquarePants - The Cosmic Shake [FitGi...
: Provides a collection of 4K and HD wallpapers specifically for this title.