Krystal, Isaac, Michaiah, Claus, K.Rool, and (Megaman, Bomberman, Knuckles, Simon Belmont) would all like to have a word with you.
Lyn, Ridley, Samurai Goroh, and Waluigi would like as well, but for some reason, they're nowhere to be seen.
Lyn, Goroh, and Waluigi are Assist Trophies, Ridley is confirmed as a boss (Like Rayquaza).
Krystal? Well.. I guess she would be an 'ok' addition, but if Wolf indeed makes it in it would seem a bit too heavy on representation for a franchise that (in recent iterations) hasn't been getting as much attention as most of the more iconic nintendo figures. (reverse argument applies if Krystal gets in instead of fox, Starfox64 was the figurehead of the popularity of Starfox, why can't they get some villain representation?)
Isaac, Golden Sun, correct? a game without representation on either of ninty's newest consoles and hasn't had an update since 2002; i enjoyed both games, but sadly any fanboyism for the series won't really result in any potential profit from an old handheld :[
Micaiah, unfortunately, probably not included as a result of FE: Radiant Dawn being in development at the same time as SS:BB, where Ike is represented in both FE games, Michaiah is/was unfortunately "too new" to be implemented into Brawl.
Claus (or Klaus?) enough twins with slightly changed aesthetics, they can mostly be covered as costumes, c_c no more clones plz. (Mario and Luigi are not clones, Mario and Dr. Mario, for all extents and purposes other than slight variations on moves WERE)
K.Rool, okay, i'll give you K.Rool, but personally i'd have rather seen Dixie Kong in before K. Rool, the whole "lizard king" angle is pretty old shoe for Nintendo. Down with lizard-tyrant-specie-ism! =P
Megaman, sadly another wasted opportunity, Sakurai would probably have been urged to use the Megaman ZX depictions (as well as Zero ZX) that correspond with the Megaman ZX DS series.
Bomberman, uh, :\ i dunno, i personally think he would look a little out of whack in a fighter with 19+ moves per character, what does bomberman do other than bomb? oh right, not much of anything >_>; try to make a bomberman moveset without using the word "bomb" more than 5 times, you'll find it incredibly taxing on your soul.
-although i do admit the awkwardness of the possibility of seeing bomberman use a bob-omb is fairly entertaining-
Knuckles--- gahhh, i would really like him but the very fact that including him would lead to a slippery slope fallacy for the Sonic enthusiasts just bothers me, people would be in outcry (ex: Why is Knuckles in and Tails isn't? Why didn't Shadow make it in? Where's Rouge? Why no Chaos? Where's Amy?)
as soon as you invite more than one of Sonic's "friends" to the party, they all insist on coming :P
Simon Belmont- The world may never know... maybe in store for SSB4? :]
that's my logic behind the inability to scrape together 6 (or even 4) more characters, take it or leave it =D