Are you implying characters in SSB have personalities? :v
I can't wait to see Ghirahim talk in the story mode.

1.) Yeah, Toon Link is better than Link in Brawl.
2.) I DO see your point now.
3.) Taking into consideration how Melee and Brawl both had 2 incarnations of Link, I don't even see a reason to fight over his design right now... They might just put in Young Link, or TP Link (Which I doubt), though it does make sense to keep Toon Link.

Melee had the same incarnation at different ages. I think they should do that again, however with Young Link being more Majora's Mask based.

I could see plenty of moveset possibilities, maybe (Transformation) mask-switching as a down-special, bunny hood for an up special, Fierce Deity's mask as a final smash, but I'm at a loss for a side-special.

Or be more like Pokemon Trainer and switch the three.

The "Transformation Mask-Switching" bit was about that.

One thing that confused me about Young Link in Melee, why does he have a bow, he never used one in Ocarina of Time at least, he used a slingshot instead. Its the same kind of weapon (as in they work the same way), they should have done that instead, if he returns they should definitely do that.

I think it may have had to do with design consistancy and the fact that the usage of bows is kinda like a Link-staple, I guess. Plus, depending on what you believe can be classified as a 'young link', younger version of Link have used bows. Like, Adult Link in Ocarina of Time also didn't use the Boomerang. So more or less; Melee's Link and Young Link aren't Ocarina of Time specific.

Oh yeah, i forgot that too lol

And yet it's stuff like this that makes people make huge theories on stuff like this.
Speaking of that, I can't wait to hear the ridiculous theories of people. Some people think Pichu in Melee is the same Pikachu in Brawl because of the costumes.

And because of the fact that Pikachu can only use Volt Tackle if they learned it as a Pichu...

The only thing confusing is Young Link in Melee, then Toon Link in Brawl. My luck there will be Teen Link in the 4th.

..no. Toon Link is basically Young Link from another game. Iirc, Toon Link is like, 8-9. Young Link is 9. It would make more sense to use another Link than just keep one form of OOT's Link.
EDIT: Oh, and, Link in OOT and Twilight Princess are both teenagers.

Difference: Gameplay and ability. Pichu in Melee sucked (I'm not saying this because I hate him, I use him often), and is easily the worst character due to his low move knockback and even lower weight, as well as damaging himself during electrical attacks and agility (...what? This isn't an electrical attack, and yet he's damaged by this the most...) His speed and agility (not the move) don't make up for this. Pikachu in Brawl was below average, but not horrible. He was still much heavier than Pichu (even Kirby's heavier than him though, which really makes no sense), and still isn't damaged by his own electric attacks like Pichu (this seemed to come from the anime, because I can't seem to find anything in a pokemon game that might've influenced the self-damage).

Similarity: A complete load of conspiracy, but could be true. Pichu was the only character in Melee to have more than one taunt, although there seems to be no way to select which taunt to use. Pikachu's rolling on the ground taunt (down taunt, if I remember correctly) seems to be based on Pichu's small little rolling over on the ground. And, obviously, they're in the same pokemon evolution chain (but just about everyone knows that).

Conspiracies and speculations can be fun to make, huh?

You cant compare Pichu and Pikachu's weight, just cuz they're similar characters does not mean they have to have similar stats. Thats like comparing Bowser's weight to Bowser Jr.

Pichu does have two good qualities though, being one of the smallest characters makes him harder to hit, and its Skull Bash fully charged has tremendous knockback, almost enough for a OHKO. Also, Pichu's taunts depend on which direction its facing.

The self damage is supposed to be a trait unique to Pichu, as in Pikachu dont have that. Its probably due to the fact that Pichu are young, and arent adept at using electric shocks yet, so it hurts them. Thats like a young child (toddler and below) being able to run and jump, they cant do that at that age, cuz their legs arent strong enough yet, you see?