Kamen Rider Ex-Aid premiered in Japan in 2016 as a video game themed tokusatsu series, where doctors transform into Riders using Gashat cartridges inspired by classic games. Its transformation sounds were designed like arcade power ups, with spoken level announcements and chiptune flourishes for each new form. Fans ripped the level up jingle for edits, AMVs and gaming videos, and it spread through tokusatsu communities as a shorthand for powering up. It remains popular because the mix of announcement and synth rise is instantly recognisable to Rider fans while still reading clearly as a generic game upgrade to everyone else.