Originally Posted by Biodeamon

When I go to the exchange shop to exchange the pumpkins I've received from an event it doesn't list how many pumpkins I have. It only lists Sparkly Coral.
When I try to trade for something it says "not enough ghost pumpkins"

How can I fix this?

From your Main Screen go to Special Mission Ongoing: The Great Parade of the Ghost Pumpkins. There your current Pumpkins should be displayed.