Quote from: Kitaru
"Retribution" badge seems to only have picked up one of my wins. It was the one I got through SpotPass. I haven't been able to register any using the Leaderboards. (Also, not a bug, but it's going to be incredibly difficult for Top 10 players to get it if they don't game the system _before_ setting their true records, as there are fewer replays at that level to work against and it's going to be that much harder to optimize further. And if you're the World Record holder in something, what are you actually supposed to do about it?)
The badge seems ambiguously worded. What you need to do to get these wins is to download replays from people on the leaderboard, and then play a regular game and register a high score that is higher than the ones you downloaded.
I agree that it can be a pretty silly badge to get, especially if there aren't 10 scores higher than yours.