What's the most "mature" Nintendo-developed game?

[GooseGaws]

Perfect Dark was self-published by Rare. Geist was published by Nintendo, but developed by n-Space. These points have all been stated previously in other posts.

@Danny355:

You're clearly missing the point. The fact that the main character is a fox flying a spaceship does not mean that the story and atmosphere of the game cannot have mature themes. If you haven't played it, you probably won't understand.