Considering how early she shows up in the game with her stats level, and has that completely absurd defense bonus combining with the time limit, probably not a whole lot.
If you play around in Spirit Board enough to get some good spirits, she's really easy, especially if you use someone who likes flat stages like Little Mac. Really the only issue is overcoming her power level, which can be done with a good number of Legend spirits. I used Cutie J my first time through (have to unlock the Ace-level Jeanne first, who appeared on the spirit board, then level her to 99 to get Cutie J).
Yeah, I wasn't touching the Spirit Board, so I couldn't match her stats. ---
Agent Triple Zero at your service! This line reserved for the true greatone, Advokaiser, the 2018 Guru Contest winner.