That's nice. Except when the original question was posed, the asker intended some meaning. You are saying "I don't care what you mean, I'm going to answer a totally different question, because I don't like one of the words you used." You're just arguing diction here, not making an actual argument. You don't like how he worded his question, so you're going to pretend he asked a totally different one.
Whatever your beef with the term "canon", it's clear that the original question does not mean for Smash to be part of the consideration. The point of the question is to be,
at the very least, "aside from Smash, who is the most powerful?"
Not at all. If that's what GameTheory is saying about the idea, then it's being dumb.
Canon can mean different things, such as what the creator of the character/franchise/series/whatever, "official" sources say about it. Things don't all fit in neatly, because most video games and comic books are about producing lots of content, not telling one, single, coherent story. And so there is a proliferation of stories being told by different people who want to go in different directions, hence you get these multiple timelines/universes, retcons and so forth. There is Earth-616 and there's Ultimate Marvel and you can argue about what's canon in each of those universes, whatever. People argue about the cartoons vs. the comics (or the same with Pokemon and the games vs. the anime). It's not an argument, however, that your fanfic you wrote in your basement is not canon. It's not an argument that Marvel Vs. Capcom is not "Marvel canon".
You're acting like the fact that there are multiple timelines in Zelda means that anything that features Legend of Zelda characters is canon. That's just idiotic. Canon might be a messy concept, but there are still some lines that can be drawn. Or at least, lines that are recognized by 99.9% of people.
Fine then. Canon doesn't matter, so there's potentially a timeline in which Samus takes the Chaos Emeralds and blows Sonic's brains all over the floor, and then feeds them to Kirby.
Ergo Samus is more powerful than either of them.
Seriously, you're arguing with me when I said that this argument is pointless because you can make up evidence for whatever side, and you're argument is nuh-uh, there's no criteria by which to exclude certain sources, so somehow that makes things MORE resolvable? My point was that you can't decide which ultimate power is more powerful as they tend to never meet in any official capacity, and company cross-overs by law* must not take sides on such issues. So saying that Triforce or the Chaos Emeralds are more powerful is based on no real evidence.
Anyway, it's obvious Sonic is not stronger than Mega Man given that they fought to a stalemate in the comics
*that's a joke