Secret Base X-301
Source: Yaen

1. Location

2. Island Heart acquisition

  • The Island Heart can randomly obtained by killing the dungeon boss.
  • To enter the dungeon you have to acquire a ticket. To obtain the ticket you have to do a repeatable yellow quest on the island which requires you to gather 1000 batteries from the enemies on the island. Each enemy gives around 10 to 20 batteries. Best to do this in a group.

3. Mococo Seeds