=/ most people don't like shadow and wouldn't want him to be in brawl but if he did I doubt very much he would be say like... falco or fox/link and young link. Now I'm not challenging any of you Shadow haters, but shadow has a lot of different moves to Sonic for example: his chaos spears attack; And if you've played sonic battle before you would see that the sonic and shadow in that game is COMPLETELY different. I think Shadow would be awesome if he was playable in brawl.
Well, lets analyze. First off, they're not
completely different. Unless Sonic's universe has a big racial profiling problem, Sonic and shadow bear enough resemblance for Sonic to get arrested for his crimes. And the gameplay between the two is almost exactly identical in SA2. So you can't say they don't have similarities.
Abilitywise?
Well, Sonic is faster, obviously. Shadow can't keep up, even with the rocket shoes (Nextgen.). This points to a superior reaction speed from Sonic. (But that's not an issue in Brawl.)
Shadow does have a more extensive use of Chaos Control, such as Blast, I'll give him that. But he needs a Chaos Emerald to use those moves, aside from Chaos Spear. And Sonic's been known to use an a wind-based attack every bit the equal of Chaos Spear. In fact, pressure differences alone could emulate most of Shadow's abilities (Except maybe the Blast.)
Although Shadow's been shown to have incredible strength, he's never been shown doing so without possessing a Chaos Emerald. He does do some rather interesting mid-air melee combat in nextgen, but that doesn't look like anything Sonic can't do. Offtopic a moment, but Sonic's Dair looks a lot like one of Shadow's moves from Sonic Battle. Interesting.
Shadow's immortality. . .Is a load of crap. Honestly. If he's immortal, how can he be hurt if you don't play well? It's already been proven ingame that Eggman saved Shadow before he fell to earth with one of his robots. As for the aging thing, cold sleep does that to a body. I don't know where the notion came from, but I suspect the comic series. Which is like a bad fanfic at times, only with pictures. Anyway, who really wants a character that's immortal, anyway? It's so one-dimensional.
Shadow does use guns and other weapons, but Sakurai's not putting them in. Besides, his aim's pretty much crap, anyway.
So, when you think about it, Shadow's really not that different from Sonic at all.
Edit: Not trying to say that you're wrong or anything, Bluffy. Just responding regularly. Thanks for being a non-flamey Shadow fan. I like your sig, BTW.