This is not the first time SEGA has attempted to make an RPG in the Sonic the Hedgehog
series. In early 1993, SEGA was involved with Falcom in the development of a Sonic role playing game for the SEGA CD titled Sister Sonic
. Just as Super Mario Bros. 2
was Doki Doki Panic
with the Mario cast replacing the original characters, in a similar manner, Sister Sonic
would be Popful Mail
with the Sonic cast replacing the original characters. As the game's name suggests, it would reveal that Sonic has a long lost sister. The game was cancelled due to fanmail sent to the company.