Jive Turkey said:Yes.
As of now I'd probably say it is either a Mario game or Pikmin.
EDIT: Oops! Forgot about Sonic the Hedgehog!
If i'm remembering my genesis history right, sonic wasn't released until a year or so after launch... i think the best launch game for genesis was probably golden axe or the alex kid game...but my memory is fuzzy, they may have been released a little after launch too.
edit// i'm pretty sure sonic's release was times to compete with the launch of the snes.