Would be nice if you actually explained why she's more obscure than the characters I mentioned. If anything you're the one coming across as a "troll" here.
I'm presented with insane logic, and
I'm the troll.
I'm told that Wii Fit Trainer was "out there" (in other words, unusual), while not obscure (unknown).
And yet, Wii Fit Trainer was hardly ever discussed prior to the reveal, and many people (including myself) didn't even know she
existed. Hell, I was constructing Speculation Charts, and even with all of the obscure and downright crazy characters I researched and got suggestions for, not once did WFT ever get brought up.
And I'm told that in comparison, the likes of Ness, Lucas, Marth, and Ike are
obscure? The only one of those that can be considered obscure was Marth, and that was because the Fire Emblem franchise was relatively unknown outside Japan at the time. Within Japan, however, Marth was a big request for Melee. Pretty Wii Fit Trainer, who was hardly ever discussed for Smash in any region, is more obscure than someone who is a popular request in at least
one.
"Out there" is characters like Dr. Kawashima and the Duck Hunt Dog. Wii Fit Trainer was obscure.