When have the MN wild ever won the Stanley cup?

Never.

The Minnesota North Stars made the finals once in 1990-1991 (Just before moving to Dallas), but were beaten out by the Pittsburgh Penguins in games.

Frankly, the team was lousy (and I do mean bad!) in the regular season (were a dozen or so games below .500) but caught fire in the playoffs. I was a kid during that playoff run, and essentially all hockey fans were cheering on the North Stars. Arguably the last true Cinderella-story the NHL has had.