MopedOfJustice
Smash Lord
If you just wait 15 seconds, MK attacks you regardless. Not to mention MK's Revenge, where he pursues you while you try to escape on a wheelie.Apparently you can't take a good humored joke, but anyway.
Pretty much half of the roster has no reason to be fighting, since when does Mario swing punches and try to beat up Peach? It's just a game, a non-canon one at that, why would you take it so seriously? Meta Knight never even attempts to attack Kirby unless Kirby picks up a sword first, yet he has no qualms with such in Brawl. Pokemon shouldn't be picking up Pokeballs and throwing them to release other Pokemon, Ness and Lucas shouldn't even be able to coexist, seeing as Ness is probably dead by the time Lucas was even born, plus Link and Toon Link being from completely separate timelines entirely. The point I'm trying to make here is that nothing that happens in Smash Bros is canon, characters in it do things that are completely out of character, things that shouldn't happen do happen, etc.
I simply came up with the idea of the Happy Mask Salesman being a fighter to override the "young Link with masks" idea, why have a third Link when you can have a character that plays completely differently use them? It isn't even that much of a stretch that the Salesman would have the masks and know how to use them.
The game throws away timelines and qualms about hurting allies. Mewtwo did some stuff with Pokeballs in the first Pokemon Movie, and we know that the anime is taken into consideration given the use of pokespeak and Mewtwo and Lucario's voice actors.
Characters do indeed keep their character, save for the friendly fire addition I previously mentioned. A character's personality and character (I apologize for overusing the word) account for a majority of their moveset, stats and so forth.
Look at WFT, GW and Villager, they all fight without fighting, as they come from entirely non-violent games (relatively speaking in GW's case). They fight by doing things it would be in character to do, like stretch, make sausages or tend trees (before chopping them down).
A character that lives in a violent world, but isn't himself violent would be acting extremely out of character by fighting. Like how Pokemon Trainer stays in the background and fights by-proxy. It would be stupid to see him out there punching and kicking along with commanding Pokemon, so he stays in the background, like he does in his own games (though he's technically in the foreground, but you get my point). HMS does the same. That's why he would make for an excellent stage element, because then he could act in accordance with his own character.
Just a random idea: What if he was an assist trophy, who had a chance of either giving the summoner a random mask (with an accompanying buff), but also has a chance to go mad in a fit of rage and throttle the summoner instead, for medium damage and massive stun? I think that would actually be really cool, and would have plenty of depth depending on how many masks he can choose from.
Note: I don't count that one instance of "throttling" enough to consider him a violent character, as it was used dramatically, not with the intention of combat, or even actually hurting Link.
Now that I think about it, I would strongly support HMS having the above AT role. I know your against it because you want him playable, but if he weren't, would you find that to be the next-best option?
The only issue would be making it work with GW, perhaps putting it on the side of his head instead?
E: I'm sorry for being a bit of a bad sport before, I just took it slightly less facetiously given our previous conversation.