Yes, but the main antagonist in one [which so happens to tbe the best-selling Mario RPG]. And like I said, Fawful is the second highest-rated villain in the Mario canon according to Nintendo Power.
First of all, if we ever got a Mario RPG character, I'm pretty sure it would be Paper Mario. The Paper Mario series sell better than the Mario & Luigi series (even if only by a little) and also has an upcoming game on the 3DS. Also, I don't think Nintendo Power decides the roster for SSB4.
By the way, the best selling Mario RPG is Super Paper Mario. Not any of the Mario & Luigi games.
I'd say Mac is more than somewhat. He's a rising star - to reference NP again, theyranked him amongst the best Nintendo heroes just recently. A critically-acclaimed and best-selling video game are two very impressive resume points for him.
Again, Nintendo Power doesn't decide the roster of Smash. But anyway, yes, the Punch-Out!! series are becoming once again popular and familiar, so Little Mac is certainly a viable candidate But two Punch-Out!! characters is very unlikely.
Sakurai has discussed Muddy Mole in the capacity of an SSB character before; if I recall correctly, he was also a fan of Mole Mania. It would be a just-fine retro character.
When it comes to retro series, it seems that Sakurai bases many choices off of his own preferences, so Muddy Mole is a possibility. But within the games, he has little to no attention from Sakurai. Besides, remember to consider all of the other retro characters that Sakurai has mentioned before.
Dark Samus doesn't apply in any capacity to any drawbacks. Similar physique to Samus? Yes. Similar abilities and function of Samus? Nein.
True, but as Pieman stated, Dark Samus has been killed off by Samus and it doesn't look like it will be returning any time soon. With new Metroid games appearing and no sign of Dark Samus, it's hard to tell what will become of Metroid in Smash. Dark Samus's chances don't seem too good though.
That shouldn't be relevant, though. Mario uses a move from Super Mario World, a move from Super Mario Sunshine, etc. Marth and Roy are from different games entirely. Captain Syrup is in the latest major Wario release, which was quite successful [more so than people believe].
Actually it's different. Super Mario World and Super Mario Sunshine are from the Super Mario series. Roy and Marth, although from different games, are from the same series; Fire Emblem. WarioWare and Wario Land are two different series.
The latest Wario LAND release did indeed include Captain Syrup. Sure she played a somewhat important role in the plot, but she definitely did not play an important role throughout the many other aspects of the game.
Also, the latest Wario Land game is actually the WORST selling game of the series (besides Wario Land II). Not to mention it was only recently revived after a nearly seven year hiatus, and with it's low sales compared to the other games, it's obvious that the Wario Land series just isn't quite as popular or familiar as it once was.
A future in Smash for Captain Syrup doesn't look bright, sorry.