Hero Celebration Day is finishing off with a slideshow of the everyday heroes of Pretty Big City, but the Mechas need to save the event when screen rips. The Mechas need to find something flat and opaque to properly show off the photos. / Pretty Big City is cooling off on a hot day with an ice slide in the park, but the situation gets slippery when the ice slide starts melting. The Mechas have to figure out how to stop the slide from melting, so their friends can have a fun day.