Sakura makes friends with a Pigmon who appears mysteriously. They quickly become close, playing together almost every day. One day Sakura goes out to a shopping mall, and when Pigmon follows her into town the shocked townspeople want to capture him.

A test to materialize Gomora's Spark Doll begins. As everyone is excited about the successful experiment, a Dark Thunder Energy strike turns Gomora into EX Gomora! Daichi unites with X, and is forced to fire their Xanadium Beam.