Defictionalization: Pyoro, which was the inspiration in story for Wario starting up his own company, was a mini game in every single game in the WarioWare series, and then ended up published standalone by Nintendo for DSiWare under the name Bird & Beans. Paper Plane (retitled Paper Airplane Chase) is possibly the same way.
Fandom Life Cycle: Somewhere between phase 1 and phase 2, which is kind of odd given the popularity of the series. If you ever need proof of this, just try and find a forum/fan site for the WarioWare series, it's much harder than you think...
No Export for You: Twisted! never reached European shores. The reason for this was never explained, but it certainly wasn't to do with the illegality of mercury tilt switches in the EU — Twisted! uses a piezoelectric gyroscope instead. Fortunately, the GBA is region free, so anyone in the region who knows English can play the game via importing.
And as a result, the Mona Pizza song is unobtainable for European players as well (until Brawl for the song, but it was remixed), because to hear it you need to either play Twisted, or at least have a game cart to use alongside Touched! via the GBA slot in the DS console.
Sequel First: Twisted! was released after Touched! in North America (which is even weirder because Twisted was supposed to be 18-Volt's intended debut in the series, which presents a bigger problem since Twisted was in Development Hell until June, and 18-Volt had one repeated line), and not at all in Europe.