Ok, I love Jigglypuff as much as the next pink-furball pokemon lover, but it is time for the puff to float away. New games, new pokemon. The big wheel keeps on turning.
Basically, the only reason I want Jiggly gone is because he has been done. Twice. Give other pokemon a chance to shine, bring uniqueness and originality in. The puffster's old news.
Don't get me wrong though. I like Jiggly as a character and he's been in two smash games now. IT's like the saying goes: out with the old, in with the new. For all you people that would say "well you could use that argument for any character", I have evidence. Mario, DK, Link, etc. have new games in which they have starred, consistently. Pikachu is the face of pokemon, while Jiggly was practically picked at random, TV show aside. (And the TV show should have no bearing on Super Smash Bros., for crying out loud)
The point is, other pokemon deserve a chance to show what they've got. Jigglypuff has had the spotlight long enough and as a devotee of both the pokemon games and SSB I would like to see other pokemon move in.
That all is what I WANT, however. Objectively speaking, Jiggly will likely still be in because she is one of the original twelve, as skullkidd just stated.