A Gashat is a fictional device from the Japanese tokusatsu series Kamen Rider Ex-Aid. It resembles a video game cartridge and is used by the main characters to transform into Kamen Riders. Each Gashat contains unique abilities and powers, often based on different video game genres. In the series, the Gashats are essential for battling the Bugsters, digital viruses that threaten humanity. The characters insert the Gashats into their Gashacon weapons or their transformation devices, allowing them to access various forms and skills during combat.