It might have a low possiblity of happening, but it's worth a shot, ya know? I mean, it's definitely not impossible.
People probably won't believe me, but this is coming from a person who has an extreme amount of good and bad luck.
Also, a few other things...
The 3DS is actually pretty darn capable from what I heard. I believe that Quote could fit into the 3DS version as well as he could fit into the Wii U version.
As for moves, you have to remember that he doesn't need to be only using the guns and the Blade. I'm not sure, but there are other things that could possibly fit into his moveset. Look at the different characters and see what they do in their own games. I'm not just talking about their Specials; I'm talking about their aerial attacks, their standard attacks, smash attacks, throws, and some other stuff. He doesn't need to use his weapons for everything, basically. Just take a close look. Duck Hunt is probably the most obvious to not exactly sticking to just his own game, ya know.
Cave Story might be only one game, but the game is on the 3DS, Wii (U), and Dsi, and those are all profit sources for Nintendo.
Honestly though, I don't know who should I vote for.
Also, I'm listening from the Star Wolf music from the Nintendo 64 and it's making my mind race.