woooooooo Lucas! awesome! i'm glad he's in; i'm a huge fan of the Mother series. i hiiiiighly doubt Ness will be in it as a seperate character, though he will probably be an alternate costume for Lucas (all you need to do i change the colors and give him a hat). this of course means that we will mostlikely be getting Mother 3 officially translated, woohoo!
heh that'd be kinda cool if they included another mother character series besides Lucas/Ness(?). i don't know much about mother 3 since i havent played the japanese version and its not translated, so... yeah. i would kinda like to see Poo/Paula/Jeff in it from Mother 2/Earthbound. but i don't know if they would put in an Earthbound character, as awesome as Earthbound was.
Oh, ok. I wasn't talking about the look-alike characters, but the clones. Most look-alikes were really clones, though. Roy, Marth, Doctor Mario, Kid Link... Kirby and Jigglypuff, and Mario and Luigi, can very easily be told apart. Mario and Luigi aren't very similar apart from their clothes and they both have mustaches, and Jigglypuff and Kirby are pretty different too.
jiggly isn't a kirby clone though, is she...? she was in the original smash game, and none of them were really clones. kirby and jigglypuff have always had totally different moves, too, and the clones are technically the ones that are similar in moveset and appearance (Falcon & Ganondorf, Link & Young Link, Pikachu & Pichu, etc...). i don't think they'd make Ness as a character of his own in Brawl since he would mostlikely just be a clone, and they said they weren't going to have so many clones or whatever. i'm fairly sure that he'll be a costume for Lucas, just like Daisy was with Peach (though they'll probably call him Ness even though he's Lucas, just because he was in SSB and SSBM and is well-known for those).