i just downloaded this i want to know where od u get the the games for the generator i would mostly like to get sonic games and mayb spider man games if there are any thanks alot

http://www.rom-world.com/dl.php?name=Sega_Genesis&letter=S

There's a place to get some of classics, but they also doesn't have Sonic or Spiderman...

You can get roms on a P2P client like aMule.