A group of talented fans has created English translations and patches for three different Japan-exclusive Pokémon Mystery Dungeon WiiWare games. These games debuted on the system between the timelines crossing through Pokémon Mystery Dungeon: Explorers of Time and Darkness as well as Pokémon Mystery Dungeon: Gates to Infinity.
The fan patches translate the game titles as Pokémon Mystery Dungeon: Tempest Adventure Squad, Radiant Adventure Squad, and Wildfire Adventure Squad. All feature a different selection of Pokémon, and plenty of fun dungeon feats to explore. Like the other games in the series, however, there are plenty of dungeons to explore instead of a story that's seen in the other games following the titles that did get official English translations.
Despite the popularity of the Pokémon Mystery Dungeon series in Western countries, these entries just didn't get translations, but it looks like now if you were waiting on the perfect opportunity to try them out (and were just unable to speak or read Japanese) this should be an easy solution. There's a brand new trailer the group released last week in which you can see some of the patch in action within.
If it looks like something you want to get in on, you can check out the translation patches over at the official site. You'll need to own the original games, which originally debuted on the Wii as Japanese exclusives, however, to play them in English. Be sure to let us know if you end up trying out the patches, and how well they work. It's never totally clear whether these things will be completely patched or not, but it certainly seems like a great effort.