From Golden Sun Universe
- Find the female NPC in violet on a bed, and show it to her.
- After a brief cutscene, follow her to the room you found the rag in.
- After another cutscene, speak with the left male NPC twice, and ask him to help you. He'll disappear into your party.
- Walk back to the cave before the elevator down and inspect the diagonal Zol stone, and you automatically acquire Ivy.