The following is my collection of Bowser wallpapers I have found on the web and on official Mario game sites. There are often different versions of the same wallpaper to fit different desktop resolutions, but the most common three are 800x600, 1024x768, and 1280x1024. If you have found other common resolutions for a wallpaper, Contact me!
Most of these Bowser wallpapers listed were released to support its respective Mario game. The wallpapers listed are sorted in order of the respective Mario game release dates, from earliest to latest. If the border around a wallpaper is blue, that means that wallpaper was the most recent submission from the last update. Often high resolution Bowser renders for the respective game are used in the wallpapers. To see individual Bowser renders, see the section on Bowser Renders
So without further delay, adorn your desktop with the greatest character of all time!
The wallpapers I list here are, to the best of my knowledge, official by Nintendo. These wallpapers were released to support its respective Mario game launch, and are often on the game's official website. Once again, if you can find more resolution versions for any wallpaper,