 The game was developed in the US by Sega Technical Institute and released  around the world almost simultaneously, so there are no significant  differences between international versions. Of the small changes that were  made, the biggest is how Tails name is displayed in the various menus. In  the Japanese version, Tails is referenced as "Miles". In the US and European  versions, hes listed as "Tails". However, whether it is displayed as "Miles"  or as "Tails", it can be changed to the other by inputting a particular code.