Sonic Jr.

In 1994, Sega released the Pico, a learning device aimed at children that is based on the Genesis hardware and ran educational game software that went into modules that were a hybrid of game cartridges and books. It is well known that one of Sonic the Hedgehog title was released for this device (Sonic World of the Hedgehog). However, there had been no plans for a completely different Sonic from the Hedgehog game to appear on Peak early in the life of the console. One of the first games for the Sega Pico was Ecco Jr. - a game based on the Ecco the Dolphin franchise, starring a young Ecco (Ecco Junior) on an educational adventure. At the time of this game's release, it was announced that there would be similar games starring the same youngsters from other Sega characters to follow, including a "Sonic the Hedgehog Jr."

 

Unfortunately, no further information on Sonic the Hedgehog Jr. was ever given and the game was never released, so you never know what adventures the boy Sonic the Hedgehog was going to continue.