Lol@Yaaay and Chair, we've been over how wrong you both are.
On topic: Metaknight is not, and never has been a problem in any European community as far as I can tell. Look at who's winning, and it's Marth, Olimar, Snake, and Wario–most of top tier minus Metaknight, in short. There is no major influx of MKs (in Germany about 5 people would lose their mains through the ban, of which the only truly relevant one is Staco). There are no signs that Metaknight will become dominant, beyond perhaps the self-fulfilling prophecies of people like Biggad and Kunai who claim that they will pick up MK if he is not banned because "He's the best" (in case you haven't noticed, I do not like these people).
Metaknight does not overcentralize the metagame.
Metaknight is not broken; this is demonstrated by the complete lack of overcentralization around him in the metagame.
If anyone else wants to name me a reason to ban a character beyond overcentralization and brokenness that doesn't essentially boil down to "Bawww we don't like the character", be my guest. In the meanwhile I will laugh derisively at any European community that decides to ban him. Here's looking at you, Finland.