Required:

- 1 Fire Drive Badge
- 4 or more Super Appeal Badges

If you have that, look for a Lava Bubble (a Red Flame), Ember (a Blue Flame), or Phantom Ember (a Green Flame), start a fight against them.

Use the Fire Drive Badge to heal and Duplicate them, and next defeat these guys, but let one allive! Repeat this trick to get major Star Points. And use the Sweet Treat or Sweet Feast to heal your HP but also FP to use Fire Drive.