Yeah, Harry... that's not happening. Not at all. If anything, Nintendo would not only want THEMSELVES to forget about the Virtual Boy, but would also want EVERYBODY ELSE to forget about Virtual Boy. So no, there is no way in Hell that Nintendo will want to represent a VIRTUAL BOY universe on a popular Nintendo series. And besides, Sakurai doesn't make WTF characters for no reason - Game and Watch, ROB, and even Wii Fit Trainer have all represented important cornerstones of Nintendo history. Harry, on the other hand, represents the most embarrassing commercial failures.
Why would you think that they would WANT to forget the Virtual Boy if they still show it in their video games.
I'm not saying Harry is likely, but I wouldn't throw out the idea of him either (However I would much prefer Sukapon to be the limbless competitor).
First off, that wasn't a prediction video and I never suggested the possibility of Baby Yoshi, only how cool it would be. Gooey hasn't shown up since Dreamland 3 on Super Nintendo and we already have all the characters we need from Kirby. Even Waddle Dee is unlikely and works better as part of King Dedede.
Never said another one was likely. But Gooey was commonly referred to as the most likely next Kirby character before Return to Dreamland was released.
Third-Parties aren't usually just well received games that appear recently on a Nintendo console. Sonic, Snake, Bomberman, and Pac-Man have all been around for ages and had more installments and impact on people. Having Prof. Layton seems kind of random. If you add him you could add any Nintendo Exclusive Third-Party that was well received. Why don't you add Chase McCain from Lego City: Undercover?
Considering that there have only been three third-party characters placed into Smash Brothers (and that this is the second game to feature them), using the term "usually" is not the best word to argue your point. Layton has had a very large impact on people, it's one of the best selling DS franchises in and out of Japan. You're not thinking much of him because he wasn't conceived in the 80s, but I assure you that you're underestimating Layton's popularity.
On Chase McCain, let's not forget that Layton's creator would want to see Layton in games like Mario Kart and Super Smash Brothers. That alone makes Layton a much larger potential Smash character than the likes of Bomberman and Pac-Man. From what I can either, nobody from either company has openly stated seeing interest in seeing either character make it into Smash Brothers (I might be wrong on Pac-Man though). That being said, Layton has a much larger chance being included in comparison to the competition he faces.
As for Duck Hunt Dog, it could work, but it's still unlikely and weird. I think he works better as a dud Assist Trophy. Nobody really suggested moves outside an NES Zapper and Ducks as a jump. Other than that it's just Dog toys, I think it's a pretty bizarre move set. I just don't see the priority of him being playable.
Considering that the Dog already could utilize the NES Zapper, what could stop Sakurai from having the Dog utilize other NES Products? (Power Glove, etc.)
The point is to add characters that bring something new to the table, which the Duck Hunt Dog can do in several ways (Duck centric moveset, Nintendo peripherals moveset, mix of both, etc.).
You didn't know about the Nintendo easter eggs in that Metal Gear game and that Snake has more installments on Nintendo consoles than Prof. Layton does?
WHAT
The Metal Gear franchise only has 5 games on Nintendo Systems (Unless you count the two virtual console titles, which then make it 7).
Whilst Layton has 7 games on Nintendo systems.
Curious Village, Diabolical Box, Unwound Future, Last Specter, Miracle Mask, Azran Legacises, and Professor Layton vs Ace Attorney.
Whatever our personal beliefs are, you don't go disrespecting it.