Originally Posted by MachThreeSlug

If you're very lucky with loading times and rush through the stage by mashing the next button with auto-run off it is possible to get 2 runs out of a bonus stage.

The loading times is what will screw you over though so it's not an entirely reliable strategy.

For me it wasn't that hard to get a 2nd run, do u use the trick to scroll while battling? That saves about as much time as running without auto-run