Sunflower Plains

From the castle, follow the low path past the hot spring. When you reach the first ramp, go up to take the high path in Evade Formation (a defensive formation).

Find a giant hole nearby containing a gold bar.

Head southwest and smash the rock blocking your way.

Break the lone pot ahead, then smash the next rock you see.

This rock is a Rocky (an enemy that throws rocks). Send some soldiers in, allowing some to climb onto its head. Attack its head to defeat it without taking damage.

Walk past the tree with the Art Piece on top and smash through the next rock.

Find and smash pots, some containing arrows.

Smash the rock blocking the path leading down. In the valley, smash another rock to reveal a crack in the ground. Open it for a hot spring (a healing area).

Break through the two wooden barriers beyond the hot spring to return to the T-junction reached previously.

Turn around and go back up the hill. Smash the next rock, which reveals another Rocky. Defeat it as before.

Arrive on a large plateau with narrow paths blocked by boulders. Smash through them.

The leftmost path leads to a hole that can be dug up for a mallet (an item that raises a soldier's attack power).

The path to the right of that leads to a giant machine gun hen (a powerful enemy). Kill it with soldiers and hunters.

Notice a hole in the ground skipped previously. Dig it open to reveal a machine gun hen. This enemy deals significant damage.

The machine gun hen guards Art Piece 100, "Don Bracocko" by Hatto.

If it is night time, return to the T-junction. A hole will have appeared, which can be dug open for a gold bar.

Go back up to the previous plateau and find a pot. Smash it to reveal a hole that can be dug up for another machine gun hen. Focus on digging the bigger hole beneath it.

A giant yellow robotic chicken called a Concodore will emerge. Do not fight the chickens yet. Send diggers into the hole to retrieve the gold bar first. Once the gold bar is out, target and quickly defeat the enemies.

Return to the castle to rest if needed, and come back the next day.

Smash through the rightmost boulder on the plateau. To the left of this path, find another machine gun hen.

The path ahead is blocked by a giant rock. Drop down to the melon field to the right.

A merchant (a unit type) will detect a hole in the middle of the field. Clear the field of Meloncholies (enemies) and the giant hen before digging up the expensive horn buried below.

Smash rocks to the northwest to exit the field. This bypasses the giant rock blocking the path earlier.

Walk down the hill between two sunflowers to reach an area near where Onii Hoppers (enemies) were fought.

Find a hammer sign by the water.

Kill the giant hen by the sunflowers ahead and check the red sign. This is Wonder Spot #3: Firefly Lake.

Reach a dead end with two bushes. Cut through the bushes to find a crack in the ground. Open it and dig to find a gold bar.

Walk back up the hill and go the other way to another dead end with a giant purse and a crack in the ground.

Send your merchant into the purse to break it open and reveal treasure.

Use a farmer (a unit type) to open the crack for a hot spring.

Backtrack along the path from the start until you find 4 Moonflowers. Kill them to open a gap in the sunflowers, allowing you to get Art Piece 32, "Blockade Flower" by Gotty.