Last time I came here, I was an advocate for Brawl's roster+Mewtwo. It's funny how much has been thrown in the loop, at this point.
As of now, I'm an advocate for Brawl's roster-Squirtle and Ivysaur+Mewtwo+Greninja. And now that I've beaten Pokemon Y, I would hate to see Jigglypuff and/or Mewtwo go that much more.
I have nothing against rooting for the little guys. That's how one of my favorite Pokemon - Jigglypuff, the expendable pile of balloon everyone seems to hate on - got in, in the first place (that, and it contributes an interesting aerial playstyle and happens to have the same body shape of Kirby, which definitely help). But the fan-made assumption that Sakurai is concocting a "Rock/Paper/Scissors"-style Pokemon roster simply for the sake of having a "Rock/Paper/Scissors"-style Pokemon roster, you must admit, is kind of grasping for straws. Sakurai has already explained how he determines newcomers in the Pokemon franchise.
I know that OmegaRuby and AlphaSapphire (I think I got those right...) were announced just days ago, but if we're going to come up with trivial Poke-patterns based on releases, I can think of another Pokemon remake that has had far more time to resonate with both fans and Sakurai: HeartGold/SoulSilver.
By this logic, Meganium confirmed.
I guess what gets under my skin about stuff like this is whenever a fandom's love for a character entails the hate of another character. I never could stand for Impa because so many people wanted her to be the end of Sheik. I could never get behind Krystal because people were hoping she'd X off either Falco or Wolf. And now people are clamoring for Sceptile to take the spot of either Jigglypuff or Mewtwo.
All of these characters that certain fans want(ed) gone are either fan-favorites, Smash staples, or both. I understand that, someday, the roster will get too big to keep everybody around. I have come to grips that the next game may be that beginning. Until then, let's not clamor for blood.
I mean, let's think about it: Pokemon, that worldwide phenomenon with an ever-growing group of lovable and popular characters, is probably the series I would first expect to breach six or seven Smash characters. I know that not everybody is a Pokemon fan, but these are iconic characters, nonetheless. I could clamor about Mario getting Rosalina all day long, but that doesn't stop the fact that Mario is an extremely famous franchise, with Rosalina being one of the more interesting characters to come out of the newer games.
In short, I would be absolutely fine if Sceptile made it in. But realize that both Mewtwo and Jigglypuff have their reasons for making it in, too.