Characters I don't want to see in SSBB as playable characters are:
Black-haired Little Mac (I know he is good, but it would be more difficult to tell if Kirby is imitating the black-haired Little Mac than the blonde-haired Little Mac.)
Tom Nook (He isn't suitable enough to fight.)
Petey Piranha
Tingle
Toad (He's being used as one of Peach's special moves.)
Toadette
King Dedede (How would he use the Hammer from Donkey Kong Arcade?)
Ridley (No flying characters allowed, unless their flying abilities last for a short amount of time.)
Dry Bones
Anyone of the Bounty Hunters from Metroid Prime: Hunters
Too many Pokemon/Pocket Monsters
Anyone from the WarioWare series (except for Wario.)
Every other Donkey Kong character (except for Donkey Kong, Diddy Kong, Donkey Kong JR., and Stanley the Bugman)
Every other Star Fox character (except for Krystal.)
Every other F-ZERO character (except for Rick Wheeler/Ryu Suzaku, Black Shadow, and/or Samurai Goroh.)
Every other Zelda character (except for today's Young Link/cel-shaded Link, Princess Zelda, Shiek, and Ganondorf.)
Anime characters like Naruto, Sasuke, Goku, Brolly, Vegeta, Luffy, Astro Boy, Osaka, Chiyo, anyone from FMA, anyone from FMP, Yugi Muto, nor any other overrated animes.
Other third-party characters like Sonic, Mega Man (any kind), Crono, Cloud Strife, Sephiroth, Sora, Rayman, Bomberman, Sam Fisher, Gordon Freeman, Master Chief, Ryu Hoshi, Ryu Hayabusa, Lara Croft, Simon Belvont, Klonoa, nor any other third-party character.
NOR
Any other characters and real people like Spider-Man, Batman, Superman, Godzilla, King Kong, Underdog, Mr. Bucket, Osama bin Laden, Reggie Fils-Ame, Chuck Norris, Chunk (Goonies), Picard (Star Trek), Darth Vader (Star Wars), Gumby, Mr. Bill, Mickey Mouse, Bugs Bunny, Mr. Rossi, nor anyone else that everyone could think of that would ruin the Super Smash Bros. franchise.