As a competitive pokemon player, you arent understanding the reasoning for tiers in pokemon. The tiers are there so that different pokemon can all see use in competitive play. If it werent for tiers, youd only see Arceus, Rayquaza, Lugia, etc in every game, and other really good pokemon that just arent at that level, would never be used, just straight up because they dont have the stats of legendaries or something of that nature. The tiers in that game are made so that more variety can be seen through competitive play, because that game WASNT DESIGNED TO BE THOROUGHLY BALANCED. If you were to bring up the idea to Nintendo of balancing Pokemon so that Pokemon like Luvdisc could compete with Kyogre, theyd laugh at you. Some Pokemon were straight up DESIGNED to be better, so in order to allow more Pokemon to see use than just the best 20 in the game, they made tiers, allowing for different meta games and more variety. I mean, there are 649 Pokemon, and if it werent for tiers, youd only ever see 20ish different ones in competitive play. The tiers are there to take advantage of the vast amount of Pokemon to choose from to create a team, and to make cool strategies and such. Its completely different than a fighting game, were everyone is meant to be on the same level.
And I dont think people understand, MK isnt so ridiculously ahead of every other character. Is he better than every other character by a noticeable margin? Yes. Does he have the advantage in 95% of situations in this game? Yes. BUT, its not so much that hes in a complete other league or is unbeatable. MK is definitely the best character, but he isnt some unstoppable force that just dominates everything. If he were so dominant, hed win every single tournament, and be the only character in the top placings at nationals, but guess what? MKs lose to other characters all the time. Does MK win more than he loses? Yes, but hes the best character in the game, and in any game, the best characters usually win more often, thats just how it is. Unless MK shows himself to be unbeatable, he shouldnt be banned imo.