Walkthroughs - Crystal Picnic - Old Forest 2
Old Forest 2 with chests is shown below. Head to the North East section of the map. One of the Flea Friends is there so you can buy supplies. The next section is a boss battle, so stock up.
Enemies in this area are the same as the previous: bazooka ants, tough ants, machete ants, wolves, faffs and ghosts.