Skipping Flowey skips all the story parts of the game for the most part, so it doesn't count towards the normal category runs. I'm guess the goal would be around 5 minutes or so. The only fight in this is against the bat as long as you can time it right to skip the normal battles. Here's a video I made so you can see more about it.

Should this be added to the guides section on Speedrun.com?