As the name suggests, it does nothing despite its special treatment as an animated base, basically acting as a regular base that can be hurt by Surge Attacks. Appears in place of the Aku Altar once it gets deactivated by completing the Mount Aku/Mount Fuji Invasion.
Turn the animation on and off using the switch in the upper left. Clicking the viewer background enables scrolling and zooming with the mouse if on desktop. Note that browser zoom may cause issues with scrolling and zooming. A list of available backgrounds can be found here. For more info on usage, see here.