CITY Sega Saturn
GAME SHARK CODE TO PLAY JAPANESE GAMES
Simply load any Japanese Sega Saturn with the Game Shark cartridge in the Saturn and then hold the buttons X, Y, Z at the final menu screen and then start it should now load normally. Saturn games that normally work with only a Ram cart will not load.
Sonic is the best to pick at the start because he's the fastest of the four characters.
Unlock the final track by placing first in all four tracks.
Unlock Dr. Robotnik by placing first in the final level.
Get Super Sonic by collecting all 7emeralds, a emerald can only be earned if you place first in a race.