Some of my old posts. Copied and pasted.
MK has:
1) 0 bad match ups
Arguable. A huge amount of people would agree that he has quite a few even ones, and some would say that there are match-ups on certain stages, or just in general that are slightly in the opponent's favor. Even if he didn't, Sagat in SF4 has no bad match-ups and is far from being banned, so this alone is a moot argument.
Diddy, Wario, and Snake all don't have bad stages either. Plus, he does have bad stages against certain match-ups. FD is a bad stage for him against Diddy. Halberd is a bad stage for him against Snake. etc.,
I'm not sure if you mean that his character spams, which is completely irrelevant, or that people are switching to use him, which also isn't that relevant. Just because a lot of people use a character doesn't mean he should be banned.
4) Too much tier dominance
You're holding WAY TOO MUCH WEIGHT on the tier list. The tier list is not the all-knowing rock that tells knowledge of exactly how characters are in relation to each other. It's very debatable and very outdated. MK having his own tier, honestly, means nothing. Snake has his own tier too if we ban MK. Should we ban Snake too?
5) Covers all 6 characteristics by using bypasses.
What characteristics/bypasses are you talking about?
6) A LOT of tourney scene dominance.
How much a lot is I'm not sure, but yes he's easily the best placing character at large tournaments. However, not only is this to be expected by the best character in the game, but again, if we ban MK (almost double the points of Snake) then Snake has nearly double the points of D3, and it's the same situation.
Semi-irrelevant. Yeah, if you don't know the match-up at all, you can get beat by a 1 day old MK. But at high levels of play (where the ban really matters) this isn't as apparent and isn't as important.
Not sure what this means. He has good match-ups? Against most of the tourney-viable characters, his advantage is no more than 60:40 (subjective numbers true, but translate that to a slight advantage).
9) Sensible movestrings off stage, on stage
Arguably, Wario, Kirby, TL, Puff, and many others have this too.