User blog comment:David Bear/Sonic's home world is in fact Mobius, not Earth/@comment-4702105-20130422215157/@comment-1669199-20130424212803

@SOF666: If memory serves, the very first Sonic games in the franchises early history never explicitly stated that Sonic's home world was called "Earth". The whole reason why "Mobius" even exists because SoA had assumed that "Mobius" was indeed the world's true name when the name "Mobius stripes" were used to refer to some of the "natural" stage gimmicks that you could run through in the older games, and this information came from Japanese sources.

If anything, the Japanese are the ones at fault here for not bothering to give the planet in question an actual name. Think about it: the worlds seen in the games and the like (save for the ACTUAL Earth in Sonic X) have many things that would imply that the world could be something different other than "Earth" despite whatever similarities the two worlds possess. Is it really that hard to believe that some people at SoA many years ago just honestly assumed that the planet was called something other than Earth because of how vastly different they are from one another?