And so it shall be. We shall ban metaknight because he is completely overpowered. We will answer the people's call. We shall also ban planking as there are characters that cannot fight against that. Now we shall also ban camping because pikachu's thundershock is too good and no one can seem to get by it. Next we can ban Snake because his land mines and C-4 are nearly invisible to the player on stages at night, therefore it gives snake an unfair advantage. So we can then go ahead and ban lucario and Pit because their roll dodgy and turtling tendencies also create an unfair advantage to the opponent. Next we'll ban bowserciding, kirbyciding, ganonciding, dededeciding, wariociding, and all other cides because its just not right. Lets go ahead and ban the ice climbers because of their infinites as well. Lets also ban Delfino's plaza because if you land in the water, you're likely to get spiked to death and there's also walk off sections that Dedede can infinite you off of. Yohsi's island should be banned too because the ghost platform can randomly save characters, especially peach who can use her parasol to buy time for the next rising. That stage also has a platform in the center which is great for campy characters to hide under. Lets also ban Smashville because there is not enough platforms. Lets then ban Final D because the stage's ledges make it too easy to get caught under, resulting in a gimp, which is just not fair. We should also ban Battlefield, because there are so many platforms that olimar can hide under and use his OP smashes. We can ban chaingrabbing, too, just because racking up an instant 50% is unfair.
As a result, the only stage that can ever be played on is a create-a-stage stage, designed with a flatground, no final d like ledges, and no way to fly under the stage, with one platform centered in the middle, high above the stage preventing camping, but not so high that MK's upthrow would kill, but wait, he is banned. And the only chracter allowed is Mario, because he is an equal and fairly balanced character that is not hard or easy to learn and has decent moves.
If the sarcasm wasn't blatant enough, I went ahead and expanded on EVERYTHING else I hear people complaining about when it comes to Brawl. So back to the topic of whether or not MK should be banned...
Should not. I've seen him get owned. I've seen good players go at it with him and beat him. I've seen DK's Samuses, pikachu's, olimar's, snakes, lucario's, and a few other characters tear him up. IMO, your likelyhood of beating metaknight is based on two things %25 character selection, %75 player skill. While tiers are good to show you where characters lay compared to others, it should in no way be your bible to how you play. There are some beasty Captain Falcon's, Ikes and links out there. If I remember right, lucario was a mid tier chracter, and only now because so many people have started picking him up (and if you picked him up so you can run the clock out, shame on you) he is moving up to high tier.
So in short, pick the character you like, and get good with him. You have more then just character stats at your disposal. You have mindgames, turtling, camping, planking, and a lot more depending on who your character is. Samus is actually a good character to pick these days because not many people know a counterpick stage for her, nor do they recognize her playstyle well enough to fight her, similar to Olimar. If you have never faced an olimar, prepare to get destroyed.
And just for the record: I main Lucario, and I'm an agressive lucario at that. I chase after MK's who try to plank, and I spike them off the stage instead. He's beatable. Learn how he works, and more importantly, learn how your OPPONENT plays him so you can work around his strategies. That is all.
Don't let my post count fool you =D