I seriously don't understand how it's not obvious that Marth is the best character in the game. Let's look at FACTS, not opinions, shall we?
Top Professional Smashers
Ken- MARTH
PC Chris- Fox
M2K- Marth
KDJ- Sheik
Azen- Marth
Mango- Jigglypuff
I listed 6 top players. Half of them use Marth, and that's not all either.
Ken mained Marth and secondaried Fox. I'm sure if he thought Fox was the best, he would have mained Fox and secondaried Marth.
Azen plays every character really, but in tournaments chooses mostly Marth to use.
M2K USED to play Fox, but he switched to Marth. He was amazing when he mained Fox, and then he became the best player in the world when he switched to Marth. THIS IS NOT A COINCIDENCE PEOPLE, despite what people say. I believe he switched to Marth because his controller was broken, but the fact that he became the best player in the world after switching to Marth is NOT just because he got better over time. It's because Marth is BETTER.
Also, the 2 most dominating players in the history of Smash are Ken and M2K. Ken being the longest world champion ever, and M2K being the current world champion. Both use Marth.
And I think the last time people saw KDJ he went all Marth rofl. I'm not using this in my argument, I'm just saying it's a funny coincidence.
Now, onto opinion, although this doesn't matter compared to what I have just said.
Marth has 1 bad matchup-Sheik.
Sheik has 2 "bad" matchups- Falco, Fox.
Fox has 1 "bad" matchup-Marth.
Falco has weird bad matchups-Peach, Ice Climbers, Falcon etc.
The most played tourney characters are Fox and Falco. Idc what anyone says, THEY BOTH LOSE TO MARTH. Fox moreso IMO. Yes, he can combo Marth, but it's nothing compared to Marth's chaingrabs. Any character that can ZTD another character off of one grab has the advantage. Even if it doesn't technically ZTD, it always sends Fox off the edge if performed correctly, where he is dead meat. Marth's edgeguarding and combos are too good on Fox. Fox can do some nasty stuff to Marth, but it's nothing compared to what Marth can do to Fox.
Same applies for Falco, although Falco's lasers help more IMO. Even though Marth has tons of ways around lasers, and his edgeguarding far outweighs Falco's lasers.
Sheik can be a pain for Marth, but even then he can do the matchup.
Marth is the best character. The facts show it.