At the start of any dating relationship, there are always a lot of firsts. First date; first kiss; first time introducing one another as boyfriend/girlfriend. For a gamer, perhaps one of the more important firsts, though, is first game played together. The question is: which one?

Nintendo has a long history of releasing games on several different systems.  Whether this is a bad thing or not largely depends on whether you are a fan or critic of Nintendo franchises in general.  Put me firmly in the "fan" camp.  I have no problem with this recycling, as long as the games are good, which in Nintendo's case, they usually are.  Who could argue that buying Smash Brothers three times was a waste of money?  And Tetris for the DS was absolutely worth purchasing, though I'd played it on the original Game Boy for years.  Let's consider Dr. Mario Online for a moment, then.  It's been available for the NES, Nintendo 64, and for the GBA TWICE, and recently it hit the WiiWare service.  Is it worth checking out, given the addition of a co-op mode?