In a handful of facts about the iOS game Draw Something, we come to learn that most players in that game don't have any idea about the Metroid series.

The least guessed words in Draw Something are: Oar, Metroid, Warhol, pounce, polaroid, meathead, Autobots

Funny thing is, I just saw the name Bowser in there, but it's not included in this list. I guess enough people know who Bowser is and can draw him well enough!