Okay, so I'm not terribly pleased with Wii Fit Trainer's inclusion, since I worry that her existence in the game will basically become a never-ending plethora of health jokes."Can you keep up with the competition?," "Teach those heavies a thing or two!" and the like.
However, it's not the inclusion of such an unorthodox character that intrigues me, since for all intents and purposes, Wii Fit Trainer fills the roster spots we've been otherwise handing to Duck Hunt Dog, Sheriff, and Doshin the Giant over the past few years. What's interesting is that this strange character is being revealed on Day One.
This could either go one of two ways, in my opinion: Wii Fit Trainer is this game's Zero Suit Samus, an unexpected female newcomer, or this game's ROB, the outright shocking character. If the latter is the case, I imagine it's because Sakurai wants to include the 'big gun' newcomers as the later reveals and get the more underwhelming but 'charming' ones out of the way now. This would be in stark contrast to Brawl, where ROB was one of the few unlockable newcomers, to lukewarm reception, while almost every other newcomer sans Lucario, Toon Link and Wolf were known ahead of time.