Ash is in a slump—after three straight losses, he’s dropped down a class in the World Coronation Series. Meanwhile, a mysterious whirling sandstorm has appeared in Mauville City, drawing people in with a strange singing noise. Ash and Goh investigate—inside, they discover a sprawling desert, and Goh catches a Trapinch and a Vibrava. They also find the source of the singing noise: a powerful Flygon! As Ash gets caught up in his own thoughts, Goh confidently defeats Flygon…and catches it, too! Then, when Goh reveals that his unconventional strategy was inspired by Ash, Ash starts feeling better and vows to train hard again so he can battle Leon!