An Appetite for Battle!

While resting on their journey, Clemont's Chespin gorges itself on all the treats that Serena has made, and it starts to show as Chespin gets fatter. Clemont is intent to help Chespin get back into shape, but when it loses in two battles that were intended as exercise, Clemont decides to create a machine to help Chespin get into shape. However, once it's complete, Chespin is nowhere to be found. Will Clemont find Chespin and be able to help it get back into shape?