Edit: So what? Marth has one more finishing smash than MK, the only one that is really even deadly is his fsmash. His dsmash is predictable and it leaves him incredibly vulnerable. His upsmash is hard to land and rarely scores kills for Marth -.-
Why does MK need useless smashes when he has his dair that ****s marth up? :3
Ok, to begin with all of Marth's smashes are good. I don't know where you are getting your information from, but it is severely flawed.
Correct, his Fsmash is deadly.
Incorrect, his Dsmash is not predictable. In fact, it's very unpredictable due to Marth's amazing options. He has the ability to be played very creatively, and due to his massive killing options, none of his moves are predictable.
His Usmash is probably his 2nd best killing move. It has amazing range due to it's cyclone effect, and has extreme knockback. It is an amazing move, and can be used to punish out of shield easily. If someone attacks your shield at a higher percent, consider them dead due to Usmash.
Everyone of his Smashes are great, something that other characters would die for.
Why does MK need smashes when his Dair messes Marth up? Please, stop acting like this, use your brain. Every character benefits from options, and a wide array of attacks. So his Dair does well vs Marth...Is that it? So now you don't need anything else? Ok, go fight a good Marth, and try to use your Dair on him all day. You'll be wishing that you learned more tactics/MK had more moves to fight Marth with.
Also, MK doesn't suck, that's not what I'm trying to imply with my last paragraph. I'm simply stating that you're actin a fool for saying MK doesn't need smashes when he can rely on his Dair.
3 REASONS WHY NOT TO RELY ON ONE MOVE
1. Attack deterioration
2. It gets predictable
3. It doesn't look cool at all