Square Enix copyrights the name "Gyrozetter" in
You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
Siliconera has an article pointing out that Square Enix has copyrighted the name "Gyrozetter" in Europe. The copyright covers the name Gyrozetter for use with video games, toys, and comics, which is exactly the kind of usage it's getting in Japan.