Relic_Raider posted... I don't think they're doing mystery dungeon anymore.
It's been ages since the last ones came out.
Edit: Looked up the release dates.
Red and Blue duo -> *2 years* -> Explorers of Time/Darkness ->*4+ years* ->Present, no games announced or implied to be in development.
I didn't count Sky for being a third version or the Wiiware games as no one cares about them. When counting the Japan-only Wiiware games, it's been around three years. --- Officially Porygon-Z of the Black Version 2 board.