In the long run, good marketing usually leaves a worse effect on a game's reputation than bad marketing. We can just laugh off Yoshi's Island being advertised with a guy dying through over-eating or Kirby shooting a ballistic missile at a cat, but people assuming Sonic is supposed to run at hyperspeed as soon as you flick a button or the goal of Pokemon is to get every single creature will linger for the rest of these series' existences.