Keep doing this every time she appears to get a lot of Simoleons. When you find Heidi Shadows, buy two rosebuds, then wait until she appears again.
To get 5,000 Simoleons, buy the flower from Heidi Shadows. Buy out her shop, then wait until after 1 a.m. When you find her south of Imperial Estates, buy from her, and do not leave so that she dos not disappear. She will sell you cheats that can save you a lot of time on getting skill points.
to 12 a.m.) and in the northern corner of the Park Maze on Fridays (3 a.m. She can be found southwest of Imperial Estates on Mondays (11 p.m. Heidi Shadows is a secret ninja character that sells you cheats.